CVE-2026-35616 on DanSec Daily

Cybersecurity Brief – 2026-05-29

Fri, 29 May 2026 00:00:00 +0000

Major Incidents or Breaches

Charter Communications suffered a data breach impacting 4.9 million accounts, with the ShinyHunters extortion group claiming responsibility for stealing personal information in early April ^[10].
Carnival Corporation confirmed a data breach affecting nearly 6 million people, also attributed to the ShinyHunters group, with exposed data including personal details of customers ^[20]^[34]^[42].
Customer data from more than 350 hotels worldwide was accessed as part of reservation-hijacking spear-phishing scams, enabling realistic phishing attacks against hotel guests ^[29].

Newly Discovered Vulnerabilities

A critical, unpatched zero-day vulnerability in Gogs, a self-hosted Git service, allows authenticated users to execute arbitrary code on affected instances. This vulnerability is accessible on Internet-facing deployments ^[5]^[16].
A critical authentication bypass vulnerability (CVE-2026-35616) in FortiClient Endpoint Management Server (EMS) has been actively exploited by threat actors to deploy credential-stealing malware. Fortinet released hotfixes in April after zero-day exploitation was detected ^[6]^[15]^[36].
A security flaw in Gitea exposed 30,000 deployments to attacks, allowing attackers to pull private container images and potentially access source code, credentials, and infrastructure ^[39].

Notable Threat Actor Activity

The North Korean state-sponsored group Kimsuky deployed new tools, including HTTPSpy, HelloDoor, and VS Code Tunnels, in attacks targeting South Korean military and corporate entities ^[4].
The Russian-linked threat cluster GreyVibe has been targeting Ukrainian organizations using AI-generated lures and custom malware, leveraging tools such as ChatGPT and Gemini to enhance their operations ^[12]^[32].
The ShinyHunters extortion gang claimed responsibility for large-scale breaches at Charter Communications and Carnival Corporation, stealing millions of customer records ^[10]^[20]^[34]^[42].

Trends, Tools, or Tactics of Interest

The BTMOB Android remote access trojan is being distributed via a malware-as-a-service model, offering a builder interface for custom phishing payloads and enabling full device takeover, financial theft, data exfiltration, and remote access. It is spreading across Brazil and Latin America ^[13]^[26]^[35].
AI is increasingly being used by both defenders and attackers. GreyVibe uses ChatGPT and Gemini for attack lures, while new security tools such as Google’s AI Threat Defense platform and Edamame’s AI agent monitoring platform are being launched to counter AI-powered threats and monitor AI coding agents for intent drift and secret theft ^[12]^[32]^[38]^[41].
Fake ChatGPT download sites are distributing malware to both Windows and Mac users, with payloads tailored to each platform ^[44].
The FBI issued a warning about fake FIFA websites ahead of the 2026 World Cup, which are being used for fraud schemes including stealing personal and financial information and selling fake tickets ^[14].

Regulatory or Policy Developments Affecting the Security Industry

Microsoft publicly advocated for Coordinated Vulnerability Disclosure (CVD), urging security researchers to work with vendors before publicizing zero-day vulnerabilities ^[7].
IBM and Red Hat announced a $5 billion investment in Project Lightwell, aiming to secure open source software supply chains and address vulnerabilities without disrupting production systems ^[37].

Sources

Charter Communications data breach affects 4.9 million accounts - bleepingcomputer.com
Carnival Cruise confirms data breach affecting nearly 6 million people - bleepingcomputer.com
Carnival Data Breach Exposed 6 Million People - securityweek.com
Carnival confirms data breach impacting nearly 6 million - malwarebytes.com
Scammers Are Using Your Real Hotel Reservations to Trick You With Spear-Phishing Attacks - wired.com
Critical Gogs RCE Vulnerability Lets Any Authenticated User Execute Arbitrary Code - thehackernews.com
New Gogs zero-day flaw lets hackers get remote code execution - bleepingcomputer.com
Threat Actors Exploit Critical FortiClient EMS Flaw to Deploy Credential Stealer - thehackernews.com
Hackers exploit FortiClient EMS flaw to push infostealer malware - bleepingcomputer.com
Critical FortiClient EMS Vulnerability Exploited in Fresh Attacks - securityweek.com
Gitea Vulnerability Exposed 30,000 Deployments to Attacks - securityweek.com
Kimsuky Deploys HTTPSpy, Expands Arsenal with HelloDoor and VS Code Tunnels - thehackernews.com
GreyVibe hackers use ChatGPT, Gemini to power cyberattacks - bleepingcomputer.com
Russia-Linked ‘GreyVibe’ Attackers Use AI to Supercharge Cyberattacks - securityweek.com
BTMOB Android malware service generates custom phishing payloads - bleepingcomputer.com
BTMOB RAT Spreads Across Brazil, LatAm via MaaS Model - darkreading.com
New BTMOB Android Malware Enables Full Device Takeover - securityweek.com
New Edamame Platform Aims to Catch AI Coding Agents Going Off the Rails - securityweek.com
Google Unveils AI Threat Defense Platform to Fight AI-Powered Cyberattacks - securityweek.com
Fake ChatGPT download site infects Windows and Mac users with malware - malwarebytes.com
FBI warns of fake FIFA websites running World Cup fraud schemes - bleepingcomputer.com
Microsoft Slams Public Zero-Day Disclosures Amid GitHub Researcher Account Removal - thehackernews.com
IBM and Red Hat Commit $5 Billion to Secure Open Source Supply Chains Under “Project Lightwell” - securityweek.com

Cybersecurity Brief – 2026-04-07

Tue, 07 Apr 2026 00:00:00 +0000

Major Incidents or Breaches

Wynn Resorts disclosed that 21,000 employees were affected by the ShinyHunters hack. The company reportedly paid a ransom to prevent data leakage.
Drift Protocol attributed its recent $280M cryptocurrency theft to a six-month, in-person operation where attackers established an operational presence inside the organisation.
Axios, a popular NPM package, was compromised in a supply chain attack involving sophisticated social engineering targeting maintainers. North Korean threat actors are linked to this and similar campaigns against Node.js maintainers.
Guardarian users were targeted via 36 malicious NPM packages impersonating Strapi plugins, enabling shell execution, container escape, and credential harvesting.
The European Commission experienced a significant cyber incident, as noted in Check Point’s threat intelligence report.

Newly Discovered Vulnerabilities

Flowise AI Agent Builder is under active exploitation for a CVSS 10.0 remote code execution vulnerability. Over 12,000 instances are exposed.
Fortinet issued an emergency patch for a zero-day authentication bypass flaw (CVE-2026-35616) in FortiClient EMS, which allows unauthenticated remote code execution. CISA has mandated federal agencies patch this vulnerability.
A new GPUBreach attack technique enables privilege escalation and system takeover through Rowhammer-induced bit-flips on GPU GDDR6 memory.
Exploit code for an unpatched Windows privilege escalation zero-day (“BlueHammer”) was leaked, allowing local attackers to gain SYSTEM or administrator privileges.
Automated credential harvesting campaigns are exploiting the React2Shell flaw in vulnerable Next.js applications.
Google DeepMind researchers identified “AI Agent Traps,” a vulnerability that allows attackers to manipulate and exploit AI agents via malicious web content.

Notable Threat Actor Activity

China-linked Storm-1175 has been observed exploiting zero-day and n-day vulnerabilities to rapidly deploy Medusa ransomware in high-velocity attacks.
Qilin and Warlock ransomware groups are using the bring-your-own-vulnerable-driver (BYOVD) tactic to disable over 300 endpoint detection and response (EDR) tools during ransomware deployment.
An Iran-linked threat actor is conducting password-spraying attacks against over 300 Israeli and UAE Microsoft 365 organisations.
DPRK-linked actors are using GitHub as command-and-control infrastructure in multi-stage attacks targeting South Korean entities.
North Korean threat actors are targeting Node.js maintainers with social engineering as part of supply chain attacks.
A threat cluster tracked as UAT-10608 is automating credential harvesting by exploiting web-exposed Next.js applications.

Trends, Tools, or Tactics of Interest

There is increased use of AI-assisted tools by threat actors in supply chain attacks, as seen in the PRT-scan campaign targeting GitHub misconfigurations.
Social engineering targeting open-source maintainers is becoming industrialised, with attackers leveraging complex, scalable tactics.
The BYOVD technique remains prevalent among ransomware operators for bypassing security controls.
Open redirects continue to be widely abused in phishing campaigns.
Infostealers are harvesting credentials and session cookies at scale, outpacing traditional breach monitoring capabilities.
Developer workstations are being increasingly targeted as entry points for credential theft and lateral movement.
Shadow AI use in healthcare persists, with medical professionals adopting unsanctioned AI tools.

Regulatory or Policy Developments Affecting the Security Industry

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has ordered federal agencies to patch the actively exploited Fortinet EMS vulnerability by Friday.
The OWASP GenAI Security Project has updated its risk matrix, now recognising 21 generative AI risks and recommending tailored security approaches for GenAI and agentic AI systems.
German authorities have formally identified two Russian nationals as the leaders of the GandCrab and REvil ransomware operations between 2019 and 2021.
Microsoft has deprecated and removed the Support and Recovery Assistant (SaRA) tool from all supported Windows versions as of March 10.

Cybersecurity Brief – 2026-04-06

Mon, 06 Apr 2026 00:00:00 +0000

Major Incidents or Breaches

Drift disclosed that the $285 million theft on April 1, 2026, resulted from a six-month social engineering campaign attributed to North Korean (DPRK) threat actors, involving targeted infiltration and operational planning.
Multiple Syrian government accounts were hijacked in March, exposing significant deficiencies in the state’s cybersecurity posture and basic operational security.

Newly Discovered Vulnerabilities

Fortinet released an emergency patch for a new critical vulnerability (CVE-2026-35616) in FortiClient Enterprise Management Server (EMS), which is being actively exploited in the wild.
Attackers are exploiting the React2Shell vulnerability (CVE-2025-55182) in vulnerable Next.js applications as part of a widespread, automated credential theft campaign.

Notable Threat Actor Activity

Germany’s Federal Criminal Police Office (BKA) identified and unmasked the main actors behind the REvil (Sodinokibi) ransomware group, including the individual known as “UNKN,” linked to both REvil and GandCrab ransomware operations. The primary suspect is named as Daniil Maksimov, a 31-year-old Russian national.
North Korean (DPRK) threat actors were responsible for the $285 million Drift hack, using prolonged and sophisticated social engineering tactics.

Trends, Tools, or Tactics of Interest

Phishing scams have shifted tactics by incorporating QR codes into fake “Notice of Default” traffic violation text messages, directing recipients to phishing sites to harvest payment and personal information.
The automated exploitation of React2Shell in Next.js applications highlights an ongoing trend towards large-scale, automated credential theft campaigns targeting web application vulnerabilities.

Regulatory or Policy Developments Affecting the Security Industry

No significant regulatory or policy developments were reported in the provided headlines.

Cybersecurity Brief – 2026-04-05

Sun, 05 Apr 2026 00:00:00 +0000

Major Incidents or Breaches

The European Commission confirmed a data breach resulting from the Trivy supply chain attack, with attackers exfiltrating over 300GB of data from the Commission’s AWS environment, including personal information.
Hackers reportedly stole Cisco source code as part of an ongoing supply chain hacking campaign.
The FBI disclosed that a recent hack of its wiretap tools poses a national security risk.

Newly Discovered Vulnerabilities

Fortinet released out-of-band patches for a critical vulnerability in FortiClient EMS, tracked as CVE-2026-35616. The flaw has a high CVSS score and has been actively exploited in the wild.

Notable Threat Actor Activity

Researchers identified 36 malicious npm packages disguised as Strapi CMS plugins. These packages delivered various payloads to exploit Redis and PostgreSQL databases, enabling persistent implants.
Axios maintainers detailed a targeted social engineering campaign where a developer was tricked by a fake Microsoft Teams error fix, leading to the hijacking of a maintainer account. The campaign is believed to be linked to a sophisticated threat actor.

Trends, Tools, or Tactics of Interest

Device code phishing attacks leveraging the OAuth 2.0 Device Authorization Grant flow have surged 37-fold this year, driven by the proliferation of new phishing kits available online.
Malicious actors are distributing the leaked Claude AI code online, bundling it with additional malware.