Clear Infosec Threat Intelligence Bulletin – Oct 21st, 2026

The attack on the British retailer shows that compromising a single identity can lead to much deeper penetration of the corporate network. Read more

A now-patched vulnerability in AWS Bedrock AgentCore could have allowed an attacker to use one AI chatbot to take over an organization’s entire fleet. Read more

Organizations are reporting that employees face threats to their families, stalking, physical violence, and abduction. But these alarming claims are hard to ver… Read more

A Chinese-speaking attacker has compromised hundreds of websites across the globe, looting from big fish like John Deere, SharkNinja, and engine manufacturer Cu… Read more

Campaigns that impersonate popular AI brands are on the rise, and they typically use ClickFix-like tactics to target unsuspecting enterprise employees. Read more

Attackers are increasingly abusing trusted SaaS platforms, cloud infrastructure, and identity systems to blend malicious activity into le… Read more

Malware is evolving rapidly, driven by advances in AI and changes in computing infrastructures. Security professionals must continuous… Read more

A newly-disclosed critical flaw in Atlassian’s data center software has a remarkably wide reach, affecting eight core products across the… Read more

GitHub Copilot CLI can be made to read sensitive files from a developer’s machine and send their contents to an attacker from a single we… Read more

Threat actors have begun to exploit a newly disclosed critical security flaw impacting Atlassian Data Center products that could allow access to sensitive files… Read more

An attacker chained three zero-day flaws in Ivanti Connect Secure, a VPN appliance, to run commands as root without logging in, security firm Volexity said… Read more

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday added four vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, inc… Read more

Siemens has addressed a DLL sideloading vulnerability impacting Siemens Software Center that it said has been exploited in ClickFix attacks. The high-severity … Read more

The China-nexus cyber espionage group tracked as Armory Castle (previously UNC5221 or Warp Panda) exploited a newly disclosed security flaw in BeyondTrust Remot… Read more

This story is developing and was written before PHP’s scheduled 14:00 UTC release on October 21. Once the release is out, the affected and fixed versions below … Read more

Microsoft on Tuesday shattered its own Patch Tuesday record by shipping patches for a whopping 1,413 vulnerabilities, including one that it said has come under … Read more

Cybersecurity researchers have discovered a cluster of 16 malicious Mozilla Firefox extensions that are capable of stealing cryptocurrency wallet recovery phras… Read more

Cybersecurity researchers are calling attention to a new malware family that has been observed targeting exposed artificial intelligence (AI) and large language… Read more

The International Monetary Fund (IMF) has become the latest financial heavyweight to warn that the AI spending frenzy could end in tears, with consequences ext… Read more