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Vulnerabilities

Vulnerability · CVE-2026-20925

External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

Published Jan 13, 2026 · catalog updated Jul 30, 2026 · Microsoft Windows 11 Version 24H2

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2026-20925 is not in CISA KEV. FIRST estimates a 17.93% chance of exploitation in the next 30 days. Check whether you run Microsoft Windows 11 Version 24H2.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
17.93%
Remediation
Version ranges on file
Affected products
vendor Microsoft Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.7623

External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

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.

  • vendor Microsoft Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.762310.0.26100.0 <10.0.26100.7623

How to fix CVE-2026-20925

What to do

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

Should you patch?

CVE-2026-20925 is not in CISA KEV. FIRST estimates a 17.93% chance of exploitation in the next 30 days. Check whether you run Microsoft Windows 11 Version 24H2.

Which versions are affected?

Compare what you have installed with Microsoft Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.7623 10.0.26100.0 <10.0.26100.7623. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 17.93%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Windows security

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. Jan 13, 2026 · EUVD

    Detected

    External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

  2. Jul 30, 2026 · EUVD

    Updated

    External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

Sources

  • CVE.orgVulnerability recordCVE-2026-20925

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-20925

    30-day exploitation probability 17.93%

    first.org
  • EUVDVulnerability recordEUVD-2026-2142

    External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 29, 2026
  • FIRST EPSSOct 29, 2026
  • EUVDOct 29, 2026