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A public proof-of-concept is now out for CVE-2026-55200, a critical flaw in libssh2 that lets a malicious or compromised SSH server trigger memory corruption on a connecting client, with possible code execution. No credentials, no user interaction. The bug affects every release up to and including 1.11.1 and carries a CVSS 4.0 score of 9.2

More from The Hacker News 29 Jun 2026, 7:06 p.m. CVE-2026-55200 Compromise Credentials Critical Vulnerability CVE Flaw Library PoC SSH

Pro-Iran group Handala breached Cal Water via an exposed GPS tool, reaching billing data for 2M customers. 5GB leaked. On June 11, 2026, the Iran-linked threat group Handala posted a claim on its blog that it had compromised California Water Service, known as Cal Water, and published a 5GB proof-of-concept data dump to back it […]

More from Security Affairs 13 Jun 2026, 9:34 a.m. Incident · 2 stories Breach Compromise Exposure GPS Iran Leak PoC

At this point, just assume your kit is compromised Citrix has urged admins to "immediately" apply a fix for CVE-2023-4966, a critical information disclosure bug that affects NetScaler ADC and NetScaler Gateway, admitting it has been exploited.…

More from The Register 25 Oct 2023, 10:00 a.m. Actively exploited CVE-2023-4966 Citrix Compromise CVE Disclosure Exploit Patch PoC