---
id: CVE-2026-58052
title: >-
  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 R…
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 R…
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-693
vendor: 7-zip
product: 7-zip
affected:
  - 7-zip <= 26.01
published: '2026-06-28'
updated: '2026-08-07'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-58052'
references:
  - url: 'https://github.com/bikini/exploitarium/tree/main/7zip-rar5-motw-chain-poc'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/ip7z/7zip'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/7-zip-mark-of-the-web-bypass-via-rar5-alternate-data-stream-name-collision
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00171
epssPercentile: 0.05772
ingestedAt: '2026-08-07T21:17:17.927Z'
---

## Overview

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.

## Affected

- `7-zip <= 26.01`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.