CVE-2026-58052 | 7-Zip for Windows through 26.02 fails to preserve the Mark-o… | CVSS 3.3 LOW

Description

7-Zip for Windows through 26.02 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.

Metadata

CVE ID: CVE-2026-58052
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-28 00:55 UTC
Published: 2026-06-28 01:32 UTC
Last updated: 2026-06-28 01:32 UTC
Primary CWE: CWE-693
Protection Mechanism Failure
Vendor / Product: 7-Zip / 7-Zip
Sources: cve.org · NVD

Severity & Metrics

3.3 LOW CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
7-Zip	7-Zip	—	0 ≤ 26.02

Weakness (CWE)

CWE	Source	Description
CWE-693	cna	Protection Mechanism Failure

CVSS scores (2)

Score	Severity	Version	Source	Vector
4.8	MEDIUM	4.0	cna	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.3	LOW	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

References (3)

Proof of Concept https://github.com/bikini/exploitarium/tree/main/7zip-rar5-motw-chain-poc
7-Zip source (ip7z/7zip) https://github.com/ip7z/7zip
VulnCheck Advisory: 7-Zip - Mark-of-the-Web Bypass via RAR5 Alternate Data Stream Name Collision https://www.vulncheck.com/advisories/7-zip-mark-of-the-web-bypass-via-rar5-alternate-data-stream-name-collision