Cybersecuritynews Critical Flaw in ZIP File Processing Enables Malware Bypass of Security Systems
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A vulnerability tracked as CVE-2026-0866 allows attackers to exploit malformed ZIP headers to evade detection by antivirus and EDR systems. This flaw can lead to malicious payloads being executed without triggering security alerts, affecting users relying on these security measures. The issue highlights significant weaknesses in how these systems handle archive files.
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Updated 210d ago How this analysis works
Timeline
2004-11-19
CVE-2004-0935 published
2026-03-09
Kb.Cert article published detailing the vulnerability
2026-03-10
CVE-2026-0866 disclosed in cybersecurity articles
2026-03-10
Cybersecuritynews article published discussing the flaw
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Critical Authentication Bypass in Rejetto HFS Exploited Within 24 Hours Anthropic's Mythos model identified a critical authentication bypass in Rejetto HTTP File Server (HFS), tracked as CVE-2026-61500, allowing remote code execution. Discovered by Horizon3 researcher Zach Hanley, the flaw was revealed on September 27, 2026, and exploitation began within 24 hours, with attacks traced to… 
Critical Citrix NetScaler Zero-Day Vulnerabilities Exploited In late September 2026, two critical zero-day vulnerabilities (CVE-2026-88771 and CVE-2026-88772) in Citrix NetScaler ADC and Gateway were actively exploited, allowing remote code execution. The Cybersecurity and Infrastructure Security Agency (CISA) added these CVEs to its Known Exploited Vulnerabilities catalog on…