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Cybersecurity Brief – 2026-09-23

Wed, 23 Sep 2026 00:00:00 +0000

Major Incidents or Breaches

The ShinyHunters cyber extortion group claims to have breached the US Federal Bureau of Investigation, stealing data on current and former employees and job applicants. The group states it exploited a zero-day vulnerability in Oracle PeopleSoft to access internal services and exfiltrate sensitive data. ShinyHunters is demanding the FBI retract a report describing its tactics and threatens to leak the stolen information if demands are not met ^[10]^[24]^[50]^[52].
Threat actors stole 170 private repositories from cybersecurity firm CrowdSec by leveraging an OAuth token obtained through the TanStack npm supply chain attack on a former employee’s computer ^[35].
Sweden’s data privacy regulator fined IT provider Miljödata $183,000 for insufficient security measures that led to a breach in August 2025, affecting 2.2 million individuals ^[22].

Newly Discovered Vulnerabilities

F5 disclosed and patched a critical zero-day vulnerability (CVE-2026-94127) in BIG-IP Access Policy Manager (APM) that allows unauthenticated attackers to execute remote code on affected systems. The flaw was actively exploited in attacks targeting OAuth servers ^[7]^[20]^[49].
Check Point released emergency fixes for a zero-day vulnerability (CVE-2026-93616) in its Security Management Server, which allowed attackers in targeted attacks to upload and execute arbitrary scripts ^[11]^[27]^[51].
Arista Networks patched a zero-day vulnerability in VeloCloud Orchestrator (VCO) On-Prem deployments, which was being actively exploited to allow remote attackers access to privileged internal functionality ^[17]^[48].
A new cPanel flaw in the CalDAV and CardDAV services enables any hosting account holder to execute code as root, granting full server control ^[3].
A critical vulnerability in Bifrost, an open-source AI gateway, allows unauthenticated attackers to execute arbitrary commands on the server without credentials ^[15].
A use-after-free vulnerability in the Linux kernel’s AF_UNIX socket subsystem enables container escape and host root access. An exploit has been released and the flaw remains unpatched in Ubuntu ^[6].
WordPress patched a critical flaw in its core software that allowed unauthenticated attackers to load arbitrary PHP files from outside theme folders, potentially leading to remote code execution on some servers ^[12].
Next.js disclosed a critical ImageResponse vulnerability that can lead to server code execution via crafted SVG input ^[9].
Adobe released patches for nine critical vulnerabilities in Connect and AEM Forms that could be exploited for arbitrary code execution and privilege escalation ^[43].
Google Chrome 154 patched 108 vulnerabilities, including several rated critical for memory safety and memory corruption ^[45].

Notable Threat Actor Activity

A Chinese state-linked threat actor (UTA0565) exploited a zero-day exploit chain in Google Chrome and Microsoft Windows via fake websites to deploy CLEANGULP malware, targeting victims with advanced techniques ^[8].
Chinese-speaking threat actors have been exploiting vulnerabilities in Zyxel GS1900 Smart Managed Switches and WordPress to steal sensitive government data from nearly 1,000 devices and over 18,500 records ^[23].
The EvilTokens phishing-as-a-service platform, which compromised more than 12,000 Microsoft accounts at over 10,000 organizations using AI-driven attack chains, was disrupted in a coordinated takedown by Microsoft, which seized 50 websites and disabled over 150 domains ^[14]^[28]^[33]^[44].
A malicious npm package (“tw-pkgprobe-7731”) posed as a Twilio bug-bounty probe to target developers, enabling credential exfiltration ^[13].
A new Windows malware, ClosedQuorum, uses multiple AI models (Google Gemini, DeepSeek, Qwen, Mistral) to autonomously determine post-compromise actions ^[25].
The Ryuk ransomware group member was sentenced to 24 months in prison for attacks on US companies ^[19].
Threat actors exploited a stolen OAuth token from a former employee to access CrowdSec’s private GitHub repositories ^[35].

Trends, Tools, or Tactics of Interest

An AI-assisted phishing campaign sent over one million personalized emails attempting payment diversion scams, demonstrating the growing use of AI in large-scale phishing operations ^[1].
AI is increasingly being leveraged in both attack (e.g., phishing, malware decision-making) and defense (e.g., autonomous security agents), with new tools emerging to benchmark and control AI agent performance ^[4]^[5]^[25]^[36]^[44]^[47].
Attackers with privileged access can register rogue external MFA providers to steal user passwords during legitimate login attempts ^[21].
More than 80,000 AI relay servers are being used to mask Chinese access to frontier AI models in the US, likely to facilitate model cloning ^[31].
A proof-of-concept zero-day tool, BigDiskBuster, was released that can block Microsoft Defender updates by filling available disk space ^[16].
The Cybersecurity and Infrastructure Security Agency (CISA) published guidance on deception techniques to help organizations set traps for cybercriminals ^[34].
Shadow IT remains a challenge, with tools like Wazuh recommended to improve visibility of unmanaged endpoints and unauthorized assets ^[26].
Honeywell research indicates that while 88% of OT security leaders consider their programs mature, only 21% have a complete OT asset inventory, and full autonomy in OT security remains rare ^[42].

Regulatory or Policy Developments Affecting the Security Industry

Sweden’s IMY imposed a significant fine on Miljödata for inadequate data protection, reinforcing regulatory expectations for IT service providers handling large volumes of personal data ^[22].

Sources

ShinyHunters Claims FBI Breach, Says It Stole Data on Agents and Job Applicants - thehackernews.com
ShinyHunters claims FBI hack, data theft in PeopleSoft zero-day breach - bleepingcomputer.com
ShinyHunters Claims FBI Hack, Demands Retraction of Threat Report - securityweek.com
ShinyHunters claims FBI breach was revenge for “false” report - malwarebytes.com
Shai-Hulud Attack Nips Cyber-Firm CrowdSec's GitHub Data - darkreading.com
Sweden fines Miljödata $183,000 over breach affecting 2.2 million - bleepingcomputer.com
F5 Patches Critical BIG-IP APM Zero-Day Exploited for Unauthenticated RCE on OAuth Servers - thehackernews.com
F5 patches BIG-IP APM zero-day flaw exploited in RCE attacks - bleepingcomputer.com
Critical F5 BIG-IP Vulnerability Exploited as Zero-Day - securityweek.com
Check Point Warns of Management Server Zero-Day Exploited in Targeted Attacks - thehackernews.com
Check Point warns of Management Server zero-day exploited in attacks - bleepingcomputer.com
Check Point Patches Exploited Management Server Zero-Day - securityweek.com
Arista patches actively exploited VeloCloud Orchestrator zero-day - bleepingcomputer.com
Arista Urges Immediate Patching of Exploited VCO Zero-Day - securityweek.com
New cPanel Flaw Lets a Hosting Account Run Code as Root, Take Full Server Control - thehackernews.com
Critical Bifrost AI Gateway Flaw Lets Attackers Run Commands Without Credentials - thehackernews.com
Exploit Released for Unpatched Ubuntu Linux Flaw Enabling Host-Root Container Escape - thehackernews.com
WordPress Issues Patch for Critical Flaw That Can Enable Code Execution on Some Servers - thehackernews.com
Critical Next.js ImageResponse Flaw Can Lead to Server Code Execution via Crafted SVG Input - thehackernews.com
Adobe Patches Critical Flaws in Connect, AEM Forms - securityweek.com
Chrome 154 Patches 108 Vulnerabilities - securityweek.com
Chinese Hackers Exploit Chrome-Windows Zero-Day Chain to Deploy CLEANGULP Malware - thehackernews.com
Chinese hackers exploit WordPress, Zyxel flaws to steal govt data - bleepingcomputer.com
Microsoft Takes Down EvilTokens Device-Code Phishing Service Tied to 12,000 Inbox Compromises - thehackernews.com
EvilTokens PhaaS disrupted after compromising 12,000 Microsoft accounts - bleepingcomputer.com
Microsoft Disrupts EvilTokens Device Code Phishing Service - darkreading.com
AI-Powered Phishing Platform EvilTokens Disrupted by Microsoft - securityweek.com
Malicious npm Package Poses as Twilio Bug-Bounty Probe, Can Exfiltrate Credentials - thehackernews.com
New ClosedQuorum Windows malware uses AI for attack decisions - bleepingcomputer.com
Ryuk ransomware member sentenced to 24 months in prison - bleepingcomputer.com
AI-Assisted Phishing Campaign Sent Over A Million Personalized Emails - blog.knowbe4.com
545 Hackers Tested It First. Now XRanges for AI Scores Your Security Agent - thehackernews.com
Anthropic and OpenAI Models Still Attempt Restricted Actions in Safety Tests - thehackernews.com
Amid Ongoing Rogue Incidents, Debate Over AI Safety Gets Real - darkreading.com
Outerlimit Raises $16 Million to Stop Rogue AI Agents From Causing Harm - securityweek.com
Rogue external MFA providers can steal passwords during logins - bleepingcomputer.com
Relays Are Masking Chinese Access to Frontier AI Models in the US - darkreading.com
Researcher Drops BigDiskBuster Zero-Day PoC That Blocks Microsoft Defender Updates - thehackernews.com
Deception by Design: CISA's Guide to Tricking Cybercriminals - darkreading.com
Reducing shadow IT visibility gaps with Wazuh - bleepingcomputer.com
Honeywell: OT Security Teams Embrace AI, but Autonomy Still Rare - securityweek.com

Cybersecurity Brief – 2026-07-11

Sat, 11 Jul 2026 00:00:00 +0000

Major Incidents or Breaches

Progress Software has instructed ShareFile customers to immediately shut down Windows Storage Zone Controllers due to a “credible external security threat” targeting these servers. The company is actively responding to the incident and has communicated directly with affected customers ^[5]^[20].
Researchers uncovered that a cybercrime group left one of its servers exposed, revealing details about the WP-SHELLSTORM campaign, which has backdoored thousands of WordPress sites. The exposure included hacking tools, logs, and target lists ^[13].
The Dutch National Police reported strong indications that Dutch hackers were involved in the February breach at telecommunications provider Odido ^[19].
A data breach at AssuranceAmerica has affected 7 million individuals, as disclosed in a roundup of recent incidents ^[33].
The US Department of Homeland Security (DHS) database was reportedly hacked, according to recent reports ^[33].

Newly Discovered Vulnerabilities

Zimbra has issued an urgent advisory to patch a critical vulnerability in its Classic Web Client that could allow attackers to execute arbitrary code via crafted emails. The flaw is actively being addressed and users are urged to update ^[4]^[24].
Six new vulnerabilities have been identified in the U-Boot bootloader, used across a wide range of hardware, which could allow malicious images to crash devices or execute code at boot, enabling stealthy firmware attacks ^[7]^[17].
A critical authentication bypass vulnerability is being actively exploited in the official Docker image for the Gitea self-hosted Git service. Attackers can impersonate any user, including administrators ^[21].
A flaw in Alibaba’s XQUIC (XRING) QUIC and HTTP/3 library allows any remote client to crash the server with legal traffic. There is currently no patch available ^[11].
A newly disclosed flaw called “Ill Bloom” in certain cryptocurrency wallet software’s recovery phrase generation has been exploited to drain over $5 million from wallets ^[16].
Researchers have demonstrated that a laser attack can reset passwords on Tangem wallet cards by targeting the chip, and affected cards cannot be patched ^[8].
Three now-patched vulnerabilities in the OpenClaw AI assistant allowed for credential theft, privilege escalation, and remote code execution through a WhatsApp-to-host attack chain ^[9].
Security issues in Microsoft BitLocker security wrappers have exposed ATMs and organizations to potential compromise ^[28].
Two critical vulnerabilities in Google Chrome were patched in rapid succession, prompting users to update for protection ^[41].

Notable Threat Actor Activity

An initial access broker associated with the Payouts King ransomware group is using Microsoft Teams phishing to deploy a malicious Microsoft Edge browser extension, facilitating ransomware attacks ^[3].
Hackers are exploiting the Gitea Docker image authentication bypass vulnerability to gain admin access to self-hosted Git instances ^[21].
Attackers are targeting Microsoft 365 users with vishing campaigns, using fake Microsoft Entra passkey enrollment requests and voice-based social engineering to gain access. Okta has issued a warning regarding these tactics ^[15]^[36].
Unknown threat actors compromised Injective Labs’ GitHub repository for its SDK project, publishing malicious npm packages designed to steal cryptocurrency wallet keys and credentials ^[6].
A China-linked group known as Silver Fox has been attributed to the new MODBEACON remote access trojan, which uses gRPC streaming for encrypted command and control traffic ^[10].
Both China and India-linked hacking groups have been documented targeting the Balochistan Police force in Pakistan over the past two years ^[35].
Researchers demonstrated “HalluSquatting,” using adversarial AI hallucinations to deliver botnet malware via popular AI assistants ^[38].

Trends, Tools, or Tactics of Interest

Cyberattacks against healthcare service providers more than doubled in the first half of 2026, with attackers increasingly targeting service providers and other healthcare businesses beyond hospitals and clinics ^[27].
GigaWiper, a new remote access Trojan, combines standalone wiper, ransomware encryption, and multi-pass wiping commands for system-level sabotage ^[37]^[39].
AI agents are driving rapid growth in non-human identities within organizations, complicating identity management and access visibility ^[23].
Researchers identified that many free Android VPN apps leak traffic, transmit unencrypted data, and engage in tracking, undermining user privacy and security expectations ^[14].
Comment stuffing in HTML phishing attachments is being used as a mechanism to evade AI-based detection systems ^[32].
AI coding tools are prompting debate over whether their security risks outweigh productivity gains, with concerns about scanning, remediation, and false positives ^[30].

Regulatory or Policy Developments Affecting the Security Industry

Multiple countries are increasing social media restrictions, particularly age-based account controls, though compliance by major platforms is reportedly lacking ^[29].
Adobe has increased its patch release cadence in response to growing security concerns ^[33].
The NSA has reinstated its Tailored Access Operations (TAO) unit, signaling renewed emphasis on offensive cyber capabilities ^[33].

Legal and Law Enforcement Actions

A member of the Ryuk ransomware group has pleaded guilty in the US and faces up to 15 years in prison for attacks on US companies ^[18].
A former ransomware negotiator for DigitalMint was sentenced to 70 months in prison for assisting the BlackCat (ALPHV) ransomware group ^[25]^[34].
A Bulgarian national has been charged with stealing $290,000 in government-seized cryptocurrency while serving a prison sentence for money laundering ^[22].
Canadian authorities have disrupted ransomware operations, as noted in a recent incident roundup ^[33].

Sources

URGENT - Progress Tells ShareFile Customers to Shut Down Storage Zone Controllers Over Security Threat - thehackernews.com
Progress urges ShareFile admins to shut down servers over “credible” threat - bleepingcomputer.com
Exposed Hacker Server Reveals WP-SHELLSTORM Backdooring Thousands of WordPress Sites - thehackernews.com
Police suspects Dutch hackers were involved in Odido breach - bleepingcomputer.com
In Other News: DHS Database Hacked, Adobe Boosts Patch Cadence, Canada Disrupts Ransomware Ops - securityweek.com
Critical Zimbra Flaw Could Let Crafted Emails Run Malicious Code in User Sessions - thehackernews.com
Zimbra urges customers to patch critical web client XSS flaw - bleepingcomputer.com
Six New U-Boot Flaws Could Let Malicious Images Crash Devices or Run Code at Boot - thehackernews.com
New U-Boot flaws could enable stealthy firmware attacks - bleepingcomputer.com
Hackers exploit critical auth bypass in Gitea Docker image - bleepingcomputer.com
Unpatched XRING Flaw in XQUIC Lets Remote Clients Crash HTTP/3 Servers - thehackernews.com
Attackers Exploit 'Ill Bloom' Vulnerability to Drain Over $5 Million From Cryptocurrency Wallets - thehackernews.com
Laser Attack Resets Tangem Wallet Passwords on Cards That Can't Be Patched - thehackernews.com
Researcher Details WhatsApp-to-Host Attack Chain Using Three OpenClaw Flaws - thehackernews.com
Fresh ATM Crypto Software Bugs: Jackpot or Bust? - darkreading.com
Two Chrome updates in two days fix critical vulnerabilities - malwarebytes.com
Threat Actor Uses Phishing to Breach Orgs for Ransomware Gangs - blog.knowbe4.com
Hackers Use Fake Microsoft Entra Passkey Enrollment to Gain Microsoft 365 Access - thehackernews.com
Okta Warns of Vishing Attacks Targeting Microsoft 365 Customers - securityweek.com
Injective Labs GitHub Compromise Pushes Wallet-Key-Stealing npm Packages - thehackernews.com
New MODBEACON RAT Uses gRPC Streaming for Encrypted C2 Traffic - thehackernews.com
China, India-Linked Hackers Both Targeted Same Pakistani Police Force - securityweek.com
‘HalluSquatting’ Turns AI Hallucinations Into Botnet Delivery Mechanism - securityweek.com
Cybercriminals Flock to Healthcare Businesses as Attacks Surge - darkreading.com
GigaWiper Combines Multiple Malware for System-Level Sabotage - securityweek.com
This new Windows malware can take over your PC and wipe it clean - malwarebytes.com
The Replicant in Your Directory: AI Agents and the Identity Security Gap - bleepingcomputer.com
Study of 281 Free Android VPN Apps Finds Traffic Leaks, Unencrypted Data, and Tracking - thehackernews.com
"Comment stuffing" in an HTML phishing attachment as a mechanism for evading AI-based detection?, (Fri, Jul 10th) - isc.sans.edu
AI Coding: Do Security Risks Outweigh Productivity Gains? - darkreading.com
More Countries Jump on the Social Media 'Ban Wagon' - darkreading.com
Ryuk ransomware member pleads guilty in the US, faces 15 years in prison - bleepingcomputer.com
Former ransomware negotiator gets 4 years for BlackCat attacks - bleepingcomputer.com
Third US Security Expert Sentenced to Prison for Helping Ransomware Gang - securityweek.com
Money launderer accused of stealing seized crypto while in prison - bleepingcomputer.com

Cybersecurity Brief – 2025-07-18

Fri, 18 Jul 2025 00:00:00 +0000

Major Incidents or Breaches

Cryptocurrency exchange BigONE suffered a security breach resulting in the theft of digital assets valued at $27 million.
An adoption agency leaked over 1.1 million records, including names and sensitive information of children, birth parents, and adoptive parents.
Chinese state-sponsored group Salt Typhoon breached a U.S. Army National Guard network for nine months in 2024, exfiltrating network configuration files and credentials.
Security researchers revealed that poor password practices at Paradox.ai led to the exposure of personal information belonging to millions of job applicants.
A vulnerability in Meta AI (now fixed) could have allowed unauthorized access to private chatbot conversations.

Newly Discovered Vulnerabilities

Cisco disclosed and patched a critical pre-authentication vulnerability (CVE-2025-20337, CVSS 10) in Identity Services Engine (ISE) and ISE-PIC, allowing unauthenticated remote code execution and file storage.
Citrix NetScaler vulnerability “CitrixBleed 2” (CVE-2025-5777) was actively exploited weeks before public proof-of-concept exploits were released.
Oracle’s July 2025 Critical Patch Update addressed approximately 200 unique CVEs, with 309 security patches issued.
Google released a Chrome update patching six vulnerabilities, including one zero-day.
VMware patched four zero-day vulnerabilities in ESXi, Workstation, Fusion, and Tools, which were exploited at Pwn2Own Berlin 2025.
A known Apache HTTP Server vulnerability is being exploited to deploy the Linuxsys cryptocurrency miner.

Notable Threat Actor Activity

Kaspersky identified “GhostContainer,” a new backdoor targeting Microsoft Exchange servers of high-value organizations in Asia, based on open-source tools.
Three previously undocumented Chinese state-sponsored threat actors, as well as a fourth group, targeted Taiwan’s semiconductor sector with spear-phishing, Cobalt Strike, and custom backdoors.
Threat actors are distributing Amadey malware and data stealers via malicious payloads hosted on public GitHub repositories to bypass security filters.
The Matanbuchus malware loader is being delivered through social engineering over Microsoft Teams voice calls, with attackers impersonating IT helpdesk staff.
LameHug malware uses large language models (LLMs) to generate Windows data-theft commands in real time.
Europol coordinated an international operation disrupting the infrastructure of the pro-Russian hacktivist group NoName057(16), known for DDoS attacks against Ukraine.
Research highlights increased use of DNS records to hide malicious code and conduct prompt injection attacks against chatbots.

Trends, Tools, or Tactics of Interest

PsMapExec, a new PowerShell-based tool, has been released for enumeration and lateral movement, supporting WinRM and SMB operations.
Security gaps in printer firmware and endpoint vetting are being increasingly targeted by attackers.
There is a rise in browser-based AI agent attacks, with security vendors emphasizing AI-first protection strategies.
AI-driven malware, such as LameHug, and the exploitation of AI tools for malicious purposes are emerging trends.
Cloud attack surface management and continuous threat exposure management (CTEM) are being discussed as alternatives to traditional vulnerability management.
Massistant, a mobile forensics tool used by Chinese law enforcement, is capable of collecting user information, files, and location data from confiscated devices.

Regulatory or Policy Developments Affecting the Security Industry

Google has filed a lawsuit against operators of the BadBox 2.0 Android malware botnet, which infected 10 million devices and ran a global ad fraud scheme.
A settlement was reached in the class action lawsuit against Meta over the Cambridge Analytica incident; details remain undisclosed.
WeTransfer has retracted a clause that would have allowed the company to train AI models on user-uploaded files, following user backlash.
An Armenian national was extradited to the US and faces charges related to the Ryuk ransomware operation.