CVE-2026-27928
Windows Hello Security Feature Bypass Vulnerability
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Windows Hello Security Feature Bypass Vulnerability
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
- Record
CVE-2026-27928- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C - Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2026-22481
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
- Record
EUVD-2026-22481- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-6qx2-q8q2-jv3c
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security...
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
- Record
GHSA-6qx2-q8q2-jv3c- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
NVD
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
- Record
CVE-2026-27928- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
Affected products
- microsoft windows server 2016
- microsoft windows server 2016 (server core installation)
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server 2022
- microsoft windows server 2022, 23h2 edition (server core installation)
- microsoft windows server 2025
- microsoft windows server 2025 (server core installation)
- microsoft windows server 2022 23h2
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-27928 is a high vulnerability (CVSS 8.7) in Microsoft Windows Server 2016, published April 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. No source names a fixed version.