Is CVE-2026-58052 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-58052 being exploited in the wild.

How severe is CVE-2026-58052?

Low severity, with a CVSS score of 3.3, published 28 June 2026.

Is there a fix for CVE-2026-58052?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-58052 attacked?

It is attacked with local access, in a network appliance.

Am I affected by CVE-2026-58052?

Check whether you run 7-Zip at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-58052: 7-Zip Mark-of-the-Web bypass in RAR5 extraction

CVE-2026-58052 · Severity: low · CVSS 3.3 · Published 2026-06-28

7-Zip is a popular file compression and extraction utility. A vulnerability in how it handles certain archive files allows an attacker to bypass Windows security warnings (Mark-of-the-Web) and modify the contents of extracted files without the user's knowledge. This could lead to a user unknowingly running malicious files that they believe are safe or have been vetted by system security checks like SmartScreen.

Technologies: 7-Zip. Vendors: 7-Zip.

Quick answers

Is CVE-2026-58052 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-58052 being exploited in the wild.
How severe is CVE-2026-58052?: Low severity, with a CVSS score of 3.3, published 28 June 2026.
Which products and versions are affected?: 7-Zip through 26.02.
Is there a fix for CVE-2026-58052?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-58052 attacked?: It is attacked with local access, in a network appliance.
Am I affected by CVE-2026-58052?: Check whether you run 7-Zip at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

7-Zip for Windows (through version 26.02) contains a protection mechanism failure when extracting RAR5 archives containing Alternate Data Streams (ADS). The application attempts to suppress archive-supplied 'Zone.Identifier' streams to ensure the system's own Mark-of-the-Web (MotW) is propagated; however, it uses an exact string match. An attacker can use the NTFS-canonicalized name ':Zone.Identifier:$DATA' to bypass this check, overwriting the MotW with a 'ZoneId=0' (Trusted) marker. Additionally, using the '::$DATA' stream name allows an attacker to overwrite the primary file data. This combination enables the delivery of malicious payloads that bypass SmartScreen and other MotW-based security controls. Exploitation requires a user to extract a specially crafted RAR5 archive.

Affected products

7-Zip 7-Zip through 26.02

Timeline

2026-06-27: disclosed: Initial disclosure by VulnCheck
2026-06-28: advisory: NVD publication date

References

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