New research from Irregular shows AI agents can retrain and redeploy their own underlying models during routine maintenance tasks. The post AI Agents Can Retrain Own Models Mid-Task, Leaking Secrets and Erasing Refusals appeared first on SecurityWeek.

A security breach at Gyazo, Helpfeel's image-sharing service, exposed about 23.62 million user records, including email addresses and password hashes, the Kyoto-based company said in a notice published Wednesday. It also exposed about 490 million image metadata records, mostly for images from January 2019 or earlier, including the IDs that make up Gyazo image links. Helpfeel said

Cisco has released security updates to address a maximum-severity Identity Services Engine vulnerability that attackers are actively exploiting in the wild. [...]

Cisco has warned of a fresh maximum-severity security flaw impacting Identity Services Engine (ISE) that has come under active exploitation. The vulnerability, tracked as CVE-2026-76460 (CVSS score: 10.0), could allow an unauthenticated, remote attacker to bypass authentication. "This vulnerability is due to insufficient authentication control on an API endpoint," Cisco said. "An attacker

Remote, unauthenticated attackers can exploit the vulnerability to bypass authentication via crafted requests. The post Active Exploitation Triggers Emergency Patch for Cisco ISE Zero-Day appeared first on SecurityWeek.

The U.S. Department of Justice (DoJ) on Tuesday announced the court-authorized seizure of internet domains associated with a distributed denial-of-service (DDoS)-for-hire service known as NightmareStresser. The domains in question are: nightmare-stresser[.]com and nightmarestresser[.]org. Visitors to the site are now greeted by a seizure banner that states - "This domain has been seized by the

Anthropic is testing a new personal finance feature called "Claude Money" that will allow you to connect your bank accounts directly to Claude and "understand your money." [...]

CISOs are not waiting for AI to prove its cybersecurity value before investing in the technology. Is it the right move?

Microsoft is investigating reports that the Windows 11 KB5124008 security update is breaking domain trust relationships on some enterprise systems, preventing users from logging in with valid domain credentials. [...]

Government agencies are warning that Iranian state-linked hackers are using a Windows malware strain named CHOSEN BRICK to target dissidents, activists, and journalists worldwide. [...]

A banking malware operation active since mid-2025 has been using a toolkit named KREMLIN to install malicious Chrome and Edge extensions that steal credentials, session tokens, and sensitive data. [...]

The consumer data broker Radaris.com has long had a reputation for ignoring requests to remove personal information from its vast empire of people-search services online. That reputation caught up with the company recently in a lawsuit alleging Radaris violated a New Jersey privacy law that provides for hefty fines against data brokers that publish personal information on state law enforcement officials. In the face of repeated stonewalling and prevarication by attorneys for Radaris, the judge i

Cybersecurity industry veteran Hal Pomeranz gives a pep talk on career anxiety and self-doubt and shares how to build meaningful connections during historical tech industry downturns.

The Spanish Data Protection Agency (AEPD) was notified of an attack allegedly carried out with an AI agent powered by a known large language model (LLM). [...]

A new type of attack hijacks the AI assistant built directly into various browsers to access sensitive information, execute malicious actions, and exfiltrate data.

Spanish regulators say an AI agent chained together a successful login, vulnerability discovery, and access to personal data in a potential milestone for autonomous cyberattacks. The post First Agentic AI Data Breach Reported to Spanish Regulator appeared first on SecurityWeek.

A critical security flaw in Issabel Framework, a web-based framework for the open-source unified communications PBX software, has come under active exploitation. The vulnerability in question is CVE-2026-89026 (CVSS v3.1 score: 9.8/CVSS v4.0 score: 9.3), which can allow an unauthenticated remote attacker to execute arbitrary operating system (OS) commands by taking advantage of a hard-coded

Enterprises in Russia have emerged as the target of three threat activity clusters tracked as NightEagle, Hacking Cat, and Toy Ghouls, according to multiple reports from Kaspersky. The cybersecurity vendor said it has identified attacks mounted by NightEagle (aka APT-Q-95), a threat actor known to be active since at least 2023, that involve new techniques for persistence and lateral movement.

Security researchers at Forever Security have shown that one ordinary browser extension could take control of the AI assistants built into five Chromium-based products: Gemini Live in Chrome, Perplexity Comet, Microsoft Edge, Opera Neon and the Claude in Chrome extension. Once the extension was installed, it could access each product's built-in AI with a single click. On Comet, Edge,

Join SecurityWeek today for a virtual summit exploring the strategies and tools organizations need to discover, prioritize, and defend their expanding attack surfaces. The post Virtual Event Today: Attack Surface Management Summit appeared first on SecurityWeek.

Ursula von der Leyen warns that advanced AI could unleash hacking on an unprecedented scale as Europe prepares new protections against social media’s “capture” of children. The post EU Chief Warns of AI-Powered Hacking, Moves to Rein In Social Media appeared first on SecurityWeek.

The ransom itself can be only a fraction of the total cost of a ransomware attack, with downtime, recovery, remediation, and legal obligations adding millions to the bill. Datto explains how a mature BCDR strategy can reduce downtime and provide a faster, more predictable path to recovery. [...]

The company provides a standard for AI systems, testing them against risks such as jailbreaks, prompt injections, and unauthorized actions. The post AIUC Raises $40 Million to Certify Enterprise AI Agents appeared first on SecurityWeek.

Mandiant says an attacker hijacked an active AI coding-assistant session at an unnamed software-as-a-service provider and later spread Shai-Hulud across about 100 internal code repositories. Before the repository spread, the assistant recommended software that the attacker had poisoned, and the recommendation was accepted. The worm stole repository secrets and source code for the

Parallels Desktop for Mac has a flaw that lets an ordinary local account run code as root, the highest level of access on a Mac, software company JFrog said this week. The attack needs code already running on the machine as a normal user, so it does not work over the network. JFrog says the fix is in Parallels Desktop 27, a version that Intel Macs cannot install. Yuval Moravchick, who leads

Google announced patches for the exploited privilege escalation vulnerability (CVE-2026-58704) on September 15. The post Pixel Modem Zero-Day Exploited in Targeted Attacks appeared first on SecurityWeek.

Microsoft says it's still investigating a known issue that causes the Copilot and Copilot Chat buttons in Classic Outlook to disappear for some Windows users. [...]

The first hours after discovering a Google Workspace breach can determine how an incident unfolds. This webinar examines real-world breaches to show which early response decisions can limit the impact and which can make matters worse. [...]

US, UK, and Dutch government agencies published a report detailing the malware, and the FBI described the abuse of Telegram for C&C. The post US, UK, Dutch Agencies Expose Iranian ‘Chosen Brick’ Surveillance Malware appeared first on SecurityWeek.

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-58704 Google Pixel Improper Authorization Vulnerability This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Execu