ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-20852

Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.

Published Jan 13, 2026 · catalog updated Jul 30, 2026 · Microsoft Windows 11 Version 25H2

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-20852. EPSS is 0.50%. Act only if a listed version of Microsoft Windows 11 Version 25H2 is installed.

Gaps on this record

  • 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.

Same product and reporting

Severity
High7.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.50%
Remediation
Vendor / distro source
Affected products
Microsoft Windows 11 Version 25H2

Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-20852

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-2026-20852. EPSS is 0.50%. Act only if a listed version of Microsoft Windows 11 Version 25H2 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?

No weakness class is stored. EPSS 0.50%. 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.

No dated events have been recorded yet.

Sources

  • CVE.orgVulnerability recordCVE-2026-20852

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-20852

    30-day exploitation probability 0.50%

    first.org
  • EUVDVulnerability recordEUVD-2026-2182

    Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.

    euvd.enisa.europa.eu

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 29, 2026
  • EUVDOct 29, 2026