ThreatsDay Bulletin: Worm Code Leaked, AI Agent Phished, Claude Action Patch + 28 New Stories

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It's been one of those weeks. You expect the usual noise: recycled malware, sloppy attacks, another easy target getting hit. Instead, there's a supply chain attack kit in a public repo, a $5,000-a-month RAT that clones browsers, and research showing AI agents can be tricked into leaking real credentials. The bigger problem is how polished this all looks now. Mule networks run like SaaS.
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AI Broke Vulnerability Management. That’s Why CISOs Are Moving Budget to BAS.

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For thirty years, vulnerability management ran on a buffer: the months between when a vulnerability was found and when someone could figure out how to weaponize it. The solution was straightforward enough; triage by severity, schedule the fix, validate, and move on. The buffer was what made that work. Today, that buffer is gone. AI didn't make your team slower. It changed the other side of the
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OceanLotus Hits Vietnam Investors With SPECTRALVIPER in FireAnt Attack

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The Vietnam-aligned threat actor known as OceanLotus has been attributed to two distinct campaigns that targeted domestic entities and stock investors with a backdoor known as SPECTRALVIPER. The campaigns involve a prolonged cyber espionage operation aimed at a Vietnamese infrastructure and transport construction corporation between mid-2024 and February 2026, as well as a supply chain attack
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GitHub to Disable npm Install Scripts by Default to Stop Supply Chain Attacks

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GitHub has announced what it said are "breaking changes" coming to npm version 12, one of which turns off install scripts by default to combat software supply chain threats. The changes aim to combat attack techniques that abuse the "npm install" command to trigger the execution of malicious code using npm lifecycle hooks. "Npm install" is used to download and install all the necessary
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China-Linked JDY Botnet Expands to 1,500+ Devices for Cyber Reconnaissance

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Cybersecurity researchers have warned of a "resurgence and expansion" of JDY, a covert network associated with China-nexus state-sponsored threat actors. "The JDY botnet comprises over 1,500 SOHO [small office and home office] and IoT devices and operates as a centrally controlled, high-performance scanner used to discover, fingerprint, and continuously map exposed services at scale," Lumen's
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Ivanti, Fortinet, and SAP Release Patches for Multiple Critical Vulnerabilities

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Fortinet, Ivanti, and SAP have released security updates to address multiple critical security vulnerabilities that could result in arbitrary code execution and information disclosure. The security flaw patched by Fortinet relates to a command injection vulnerability in FortiSandbox, FortiSandbox Cloud, and FortiSandbox PaaS WEB UI. It's tracked as CVE-2026-25089 (CVSS score: 9.1). "An
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Unpatched Langflow Flaw CVE-2026-5027 Exploited for Unauthenticated RCE

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A high-severity unpatched security flaw in Langflow, an open-source low-code platform to build artificial intelligence (AI) applications, has come under active exploitation in the wild, according to findings from VulnCheck. The vulnerability in question is CVE-2026-5027 (CVSS score: 8.8), a case of path traversal that could allow an attacker to write files to arbitrary locations. "The 'POST /
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CISA Adds Cisco, Chrome, and Arista Flaws to KEV Catalog Amid Active Exploitation

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The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday added three new vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, following reports of active exploitation. The list of vulnerabilities is as follows - CVE-2026-20245 (CVSS score: 7.8) - An improper encoding or escaping of output vulnerability in Cisco Catalyst SD-WAN Manager that could allow an
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Who Runs the Ransomware Group ‘The Gentlemen?’ (Krebs on Security)

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A cybercrime group known as The Gentlemen has emerged as the second most active ransomware gang by victim count, rapidly attracting a talented pool of hackers through an aggressive recruitment strategy that promises affiliates 90 percent of any ransom paid by victims. This post examines clues pointing to a real life identity for the administrator of The Gentlemen ransomware group. A graphic created and shared by The Gentleman ransomware group administrator Hastalamuerte on Breachforums in May 2026. Credit: ke-la.com. Experts at the security firm Check Point Software have been closely covering exploits of The Gentlemen, a so-called “ransomware-as-a-service” (RaaS) offering that pays affiliates handsomely to help spread the group’s malware. “A 90/10 affiliate revenue split — compared to the industry standard 80/20 — is accelerating the group’s growth by attractive…
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Who Runs the Ransomware Group ‘The Gentlemen?’

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A cybercrime group known as The Gentlemen has emerged as the second most active ransomware gang by victim count, rapidly attracting a talented pool of hackers through an aggressive recruitment strategy that promises affiliates 90 percent of any ransom paid by victims. This post examines clues pointing to a real life identity for the administrator of The Gentlemen ransomware group. A graphic created and shared by The Gentleman ransomware group administrator Hastalamuerte on Breachforums in May 2026. Credit: ke-la.com. Experts at the security firm Check Point Software have been closely covering exploits of The Gentlemen, a so-called “ransomware-as-a-service” (RaaS) offering that pays affiliates handsomely to help spread the group’s malware. “A 90/10 affiliate revenue split — compared to the industry standard 80/20 — is accelerating the group’s growth by attractive…
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