Cybersecurity Brief – 2025-11-27

Thu, 27 Nov 2025 00:00:00 +0000

Major Incidents or Breaches

Gainsight has expanded its list of impacted customers following a recent security alert from Salesforce, indicating the breach affected more customers than initially disclosed.
Multiple London councils, including the Royal Borough of Kensington and Chelsea and Westminster City Council, have experienced IT service disruptions due to a cyberattack.
Comcast will pay a $1.5 million fine after a vendor data breach in February 2024 exposed the personal information of nearly 275,000 customers.
Dartmouth College confirmed a data breach resulting from an Oracle hack, with over 226 GB of files stolen and leaked.
The OnSolve CodeRED emergency alert platform in the US was disrupted by a ransomware attack from the Inc Ransom group, resulting in operational impact and data breach.
Thousands of secrets, including credentials and private keys, were leaked by users of JSONFormatter and CodeBeautify code formatting platforms.
A major sportswear company was targeted by a high-volume phishing campaign between 29 and 30 October 2025, as detected by KnowBe4 analysts.

ASUS released firmware updates to address nine security vulnerabilities in AiCloud routers, including a critical authentication bypass flaw.
The ’node-forge’ JavaScript cryptography library patched a vulnerability that allowed attackers to bypass signature verification with specially crafted data.
A new malicious Chrome extension was discovered that injects hidden Solana transfer fees into Raydium swaps, diverting funds to attacker-controlled wallets.
Microsoft warned that FIDO2 security keys may prompt users for a PIN after recent Windows updates since September 2025.
Microsoft announced plans to secure Entra ID sign-ins from external script injection attacks, with implementation set for mid-to-late October 2026.

The Shai-Hulud v2 supply chain attack has spread from npm to Maven, compromising over 830 npm packages and exposing thousands of secrets.
Qilin ransomware was deployed in a sophisticated supply chain attack targeting a South Korean managed service provider, resulting in data theft from 28 financial sector victims.
The RomCom threat group used SocGholish fake update attacks to deliver Mythic Agent malware to a US-based civil engineering company.
A new Mirai-based botnet, ShadowV2, has been observed exploiting known vulnerabilities in IoT devices from D-Link, TP-Link, and others, using the recent AWS outage as a test event.
Scammers are using fake LinkedIn job postings and video updates to distribute Flexible Ferret malware to Mac users, enabling multi-stage data theft and long-term access.
The “Scattered LAPSUS$ Hunters” group continued data theft and mass extortion campaigns against major corporations.
Cybercriminals have increasingly targeted financial institutions and individuals with account takeover fraud, causing $262 million in losses in 2025, according to the FBI.

NTLM relay and credential forwarding attacks continue to be exploited, with new vulnerabilities and abuse techniques identified in 2025.
The EMEA finance and banking sector faces escalating cybersecurity challenges, with increased targeting and advanced threats.
Advanced digital fraud attacks surged 180% in 2025, with generative AI used for creating deepfakes, synthetic IDs, and autonomous bots.
Attackers are integrating large language models (LLMs) into malware to evade detection and augment code in real time.
“Dark LLMs” are facilitating more competent attacks by low-level cybercriminals, though with limited technical sophistication.
Prompt injection vulnerabilities are a growing concern for agentic AI-enabled browsers, such as ChatGPT’s Atlas Browser.
Over half of surveyed enterprises are uncertain about their ability to secure non-human identities (NHIs), highlighting a gap in identity security controls.
Increased use of community-maintained tools (e.g., Chocolatey, Winget) for patching and updates presents both opportunities and risks for IT teams.

The UK government has introduced a new Cyber Security and Resilience Bill, setting out enhanced requirements for critical infrastructure organisations.