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CVE-2026-53613VulnerabilityPublished Updated

Microsoft · util-linux mount target TOCTOU allows local privilege escalation

Affects MicrosoftSource GCVE Database

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Not known to be exploited.

Data as of 6 Nov 2026, 11:23 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS
0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Microsoft Security Response Center MicrosoftAffected
  • =3.0
Fixed in–

AI-suggested

Until a fix is available, restricting local access to trusted users may reduce risk.

Description

A time-of-check to time-of-use (TOCTOU) vulnerability exists in util-linux mount target functionality, allowing local privilege escalation on affected systems. This flaw is identified as CVE-2026-53613 and affects version 3.0 of the product. No CVSS score or detailed impact metrics are provided. No known exploits in the wild have been reported, and no patch information is available.

References

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