CVE-2026-58052Public exploit

Mark-of-the-Web bypass via ADS name collision

Published Jun 28, 2026 · Updated Jun 28, 2026

Protection mechanism failure in 7-Zip for Windows through 26.01 allows attackers to bypass Mark-of-the-Web via a crafted RAR5 archive. Its exact-name guard misses a :Zone.Identifier:$DATA stream that NTFS aliases to Zone.Identifier, while ::$DATA aliases the default stream. A user must extract the archive to an NTFS destination with zone propagation, after which archive data can remove SmartScreen warnings and replace visible file content.

CVSS severity4.8
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Protection mechanism failure in 7-Zip for Windows through 26.01 allows attackers to bypass Mark-of-the-Web via a crafted RAR5 archive. Its exact-name guard misses a :Zone.Identifier:$DATA stream that NTFS aliases to Zone.Identifier, while ::$DATA aliases the default stream. A user must extract the archive to an NTFS destination with zone propagation, after which archive data can remove SmartScreen warnings and replace visible file content.

The record

CVE
CVE-2026-58052
Published
Jun 28, 2026
Updated
Jun 28, 2026
Vendor
7-Zip
Product
7-Zip
Classifications
CWE-693, T1564.004, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=26.02

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

7-Zip · 7-Zipversion=0 <=26.02

Published CVSS scores

3.3VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.8VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
T1564.004Hide Artifacts: NTFS File Attributes
T1204.002User Execution: Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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