A vulnerability in B1 Free Archiver v1.5.86 allows files extracted from downloaded archives to bypass Windows Mark of the Web (MotW) protections. When an archive is downloaded from the internet and extracted using B1 Free Archiver, the software fails to propagate the 'Zone.Identifier' alternate data stream to the extracted files. As a result, these files can be executed without triggering Windows Defender SmartScreen warnings or security prompts, enabling untrusted code execution without standard security restrictions.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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Project Subscriptions
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Advisories
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Fixes
Solution
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Workaround
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References
History
Wed, 29 Apr 2026 20:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A vulnerability in B1 Free Archiver v1.5.86 allows files extracted from downloaded archives to bypass Windows Mark of the Web (MotW) protections. When an archive is downloaded from the internet and extracted using B1 Free Archiver, the software fails to propagate the 'Zone.Identifier' alternate data stream to the extracted files. As a result, these files can be executed without triggering Windows Defender SmartScreen warnings or security prompts, enabling untrusted code execution without standard security restrictions. | |
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Projects
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MITRE
Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-04-29T20:02:30.158Z
Reserved: 2025-06-16T00:00:00.000Z
Link: CVE-2025-50328
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-04-29T21:16:19.600
Modified: 2026-04-29T21:16:19.600
Link: CVE-2025-50328
Redhat
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OpenCVE Enrichment
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Weaknesses
No weakness.