CVE-2026-58052
LowCVSS 3.3Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
7-Zip for Windows up to version 26.01 fails to preserve the Mark-of-the-Web when extracting a crafted RAR5 archive. Its guard that suppresses an archive-supplied Zone.Identifier stream matches the exact name 'Zone.Identifier' while a RAR5 STM record named ':Zone.Identifier:$DATA' is not matched and NTFS canonicalizes it to the same stream, overwriting the propagated Internet-zone marker with ZoneId=0. A second STM record named '::$DATA' overwrites the extracted file's default data stream, letting an attacker defeat SmartScreen/MotW warnings and spoof file content.
Risk Assessment
An attacker can deliver a file that, after extraction, bypasses SmartScreen and Mark-of-the-Web warnings, impersonating trusted content. The user may be tricked into opening a malicious file without awareness of the threat.
Recommendation
Immediately update 7-Zip to a version newer than 26.01 that includes a fix for this vulnerability. Consider temporarily using alternative archiving tools as a workaround.
Original NVD description (English source)
7-Zip for Windows through 26.01 fails to preserve the Mark-of-the-Web when extracting a crafted RAR5 archive, because its guard that suppresses an archive-supplied Zone.Identifier stream matches the exact name 'Zone.Identifier' while a RAR5 STM record named ':Zone.Identifier:$DATA' is not matched and NTFS canonicalizes it to the same stream, overwriting the propagated Internet-zone marker with ZoneId=0. A second STM record named '::$DATA' overwrites the extracted file's default data stream, letting an attacker defeat SmartScreen/MotW warnings and spoof file content.