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Vulnerabilities

Vulnerability · CVE-2026-27928

Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.

Published Apr 14, 2026 · catalog updated Jun 17, 2026 · windows server 2016

Check if you run it

No confirmed exploitation is on record for CVE-2026-27928. EPSS is 0.71%. Act only if a listed version of windows server 2016 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.
Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.71%
Remediation
Advisory link
Affected products
cpe microsoft/windows server 2016 · cpe microsoft/windows server 2019 · cpe microsoft/windows server 2022 · cpe microsoft/windows server 2022 23h2 · cpe microsoft/windows server 2025

Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature 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.

  • cpe microsoft/windows server 2016version unspecified
  • cpe microsoft/windows server 2019version unspecified
  • cpe microsoft/windows server 2022version unspecified
  • cpe microsoft/windows server 2022 23h2version unspecified
  • cpe microsoft/windows server 2025version unspecified

How to fix CVE-2026-27928

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-2026-27928. EPSS is 0.71%. Act only if a listed version of windows server 2016 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-20: Improper Input Validation. EPSS 0.71%. 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. Apr 14, 2026 · NIST NVD

    Detected

    Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.

  2. Jun 17, 2026 · NIST NVD

    Updated

    Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.

Sources

  • CVE.orgVulnerability recordCVE-2026-27928

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-27928

    30-day exploitation probability 0.7%

    first.org
  • NIST NVDVulnerability recordCVE-2026-27928

    Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.

    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.