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TI-2026-41807 Aliases CVE-2026-58052GHSA-fx33-p83c-vpr5

7-Zip - Mark-of-the-Web Bypass via RAR5 Alternate Data Stream Name Collision

Priority MEDIUM 55CWE-693Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-693.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00171 6th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
7-Zip7-Zipup to 26.01—No fix listedCNA
  • 7-Zip Vendor7-Zip Affected up to 26.01 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:7-zip:7-zip:*:*:*:*:*:*:*:*before 26.03Vulnerable7-Zip
  • cpe:2.3:a:7-zip:7-zip:*:*:*:*:*:*:*:* Versions before 26.03 Vulnerable ·7-Zip

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-58052
  2. 2026-10-03 Alias added: GHSA-fx33-p83c-vpr5

References

Exploit 1

Other 1

  • TI-2025-00330 Protection mechanism failure in 7-Zip KEVCVSS 3.1HIGH 7.0
  • TI-2026-35535 GHSL-2026-140_7-Zip: 7-Zip has a heap buffer overflow via NTFS compressed stream buffer under-allocation CVSS 3.1HIGH 8.8
  • TI-2024-10630 Integer underflow in 7-Zip CVSS 3.1HIGH 7.8
  • TI-2023-14827 Ppmd7.c in 7-Zip before 23.00 allows an integer underflow and invalid read operation via a crafted 7Z archive. CVSS 3.1HIGH 7.8
  • TI-2026-35532 7-Zip SquashFS Fragment Offset Overflow (GHSL-2026-116) CVSS 3.1HIGH 8.1
  • TI-2026-35551 GHSL-2026-121 7-Zip UEFI DEPEX OOB Read CVSS 3.1HIGH 7.1
See all 31 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences