CVE-2025-50328

HIGH

7.3

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.

CVE Details

CVSS v3.1 Score7.3

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/29/2026

Last Modified4/30/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-290

References

https://b1.org/(cve@mitre.org)

https://github.com/math69b/B1FREE/blob/main/B1%20Free%20Archiver%20version(cve@mitre.org)

https://github.com/math69b/B1FREE/blob/main/B1%20Free%20Archiver%20version(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.