Cybersecurity News and Updates

Anthropic is most concerned about Claude Mythos 5’s reckless behavior after recent incidents in which real systems were hacked.

The post Widened Scan Turns Up Fourth Rogue Claude Cyber Incident appeared first on SecurityWeek.

Starting Friday, businesses operating in the EU will have just 24 hours to notify the government any time they discover serious product security incidents.

Anthropic on Wednesday disclosed a fourth incident in which its artificial intelligence (AI) model broke into real third-party systems, marking the latest in a growing list of cases that have raised concerns about the security risks posed by autonomous AI agents.

The AI company said the incident dates back to January 2026 and involved an early version of Claude Opus 4.6 that breached “

Nearly one in ten of the internet-facing LiteLLM servers that Wiz Research scanned in February accepted sk-1234, the example admin key in LiteLLM’s own setup guide.

LiteLLM is an open-source AI gateway, the software a company puts between its applications and the model providers it pays for. That key is the gateway’s administrator credential.

Anyone who holds it can read every

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday added three flaws, each impacting Cisco, Citrix, and Fortinet, to its Known Exploited Vulnerabilities (KEV) catalog, requiring Federal Civilian Executive Branch (FCEB) agencies to apply the patches by September 12, 2026.

The vulnerabilities are listed below –

CVE-2026-20079 (CVSS score: 10.0) – An authentication

The exploit provides full System privileges on Windows machines running the September 2026 patches.

The post New ‘ShieldCrash’ Zero-Day Exploit Targets Microsoft Defender appeared first on SecurityWeek.

Cisco and CISA have flagged exploitation of CVE-2026-20079, a vulnerability disclosed in March 2026.

The post Organizations Warned of Cisco Secure FMC Exploitation appeared first on SecurityWeek.

In June 2026, hackers stole personal, health, and insurance information from AdaptHealth’s systems.

The post 4.1 Million Impacted by AdaptHealth Data Breach appeared first on SecurityWeek.

Criminal and state-sponsored adversaries are increasingly using AI to automate and scale their attacks, according to GTIG.

The post AI Is Giving Lesser-Resourced Attackers Nation-State-Level Reach, Google Warns appeared first on SecurityWeek.

The company will increase its US market presence and will expand its engineering and go-to-market teams.

The post HelmGuard Raises $7.3 Million for Agentic GRC and Security appeared first on SecurityWeek.