Malformed ZIP Files Allows Attackers to Bypass Antivirus and EDR Detections

A critical flaw in how antivirus and Endpoint Detection and Response (EDR) systems process archive files. Tracked as CVE-2026-0866, this weakness allows attackers to use intentionally malformed ZIP headers to sneak malicious payloads past standard security scanners entirely undetected. ZIP archives contain embedded metadata, such as version details, operational flags, and specific compression methods, which […]

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