High severity · published Apr 14, 2026
CVE-2026-27928
Windows Hello Security Feature Bypass Vulnerability
8.7
CVSS
0.4%
EPSS
No
On KEV
Description
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WS
Windows Server 2016 · Microsoft
10.0.14393.0 before 10.0.14393.9060 · source: vendor, NVD
WS
Windows Server 2016 (Server Core installation) · Microsoft
10.0.14393.0 before 10.0.14393.9060 · source: vendor
WS
Windows Server 2019 · Microsoft
10.0.17763.0 before 10.0.17763.8644 · source: vendor, NVD
WS
Windows Server 2019 (Server Core installation) · Microsoft
10.0.17763.0 before 10.0.17763.8644 · source: vendor
WS
Windows Server 2022 · Microsoft
10.0.20348.0 before 10.0.20348.5020 · source: vendor, NVD
WS
Windows Server 2022, 23H2 Edition (Server Core installation) · Microsoft
10.0.25398.0 before 10.0.25398.2274 · source: vendor
WS
Windows Server 2025 · Microsoft
10.0.26100.0 before 10.0.26100.32690 · source: vendor, NVD
WS
Windows Server 2025 (Server Core installation) · Microsoft
10.0.26100.0 before 10.0.26100.32690 · source: vendor
WS
Windows Server 2022 23h2 · Microsoft
before 10.0.25398.2274 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27928
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-27928
Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27928
More from Windows Server 2016
10.0
CVE-2020-1350
Microsoft Windows DNS Server Remote Code Execution Vulnerability
9.8
CVE-2026-33824
Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability
9.8
CVE-2025-59287
Windows Server Update Service (WSUS) Remote Code Execution Vulnerability
9.8
CVE-2017-8543
Microsoft Windows Search Remote Code Execution Vulnerability
9.0
CVE-2020-1040
Microsoft Hyper-V RemoteFX vGPU Remote Code Execution Vulnerability