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Vulnerabilities

Vulnerability · CVE-2026-26131

Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally.

Published Mar 10, 2026 · catalog updated Jun 17, 2026 · Incorrect default permissions in

Check if you run it

No confirmed exploitation is on record for CVE-2026-26131. EPSS is 0.31%. Act only if a listed version of Incorrect default permissions in is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Incorrect default permissions in).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.31%
Remediation
Advisory link
Affected products
cpe microsoft/.net

Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/.netversion unspecified

How to fix CVE-2026-26131

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-26131. EPSS is 0.31%. Act only if a listed version of Incorrect default permissions in is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-276: Incorrect Default Permissions. EPSS 0.31%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 10, 2026 · NIST NVD

    Detected

    Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally.

  2. Jun 17, 2026 · NIST NVD

    Updated

    Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally.

Sources

  • CVE.orgVulnerability recordCVE-2026-26131

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-26131

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-26131

    Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.