CVE-2026-27906
MediumCVSS 4.4Exploitation Probability (EPSS)
Low risk33th percentile - higher than 33% of all known CVEs
Summary
Improper input validation in Windows Hello allows an authorized attacker to bypass a security feature locally. The vulnerability relates to incorrect checking of input data in the authentication mechanism.
Risk Assessment
An authorized local attacker can bypass a Windows Hello security feature, potentially leading to unauthorized access to protected resources. This may undermine trust in biometric authentication.
Recommendation
Apply Microsoft Windows Hello security updates. Consider additional authentication layers for critical systems until the fix is deployed.
Other vulnerabilities in Windows Hello
See all- CVE-2026-83926Medium
Improper certificate validation in Windows Hello allows an authorized attacker to bypass a security feature locally.
- CVE-2026-83907Medium
Exposure of sensitive system information to an unauthorized control sphere in Windows Hello allows an authorized attacker to disclose information locally.
- CVE-2026-83853High
Use after free in Windows Hello allows an authorized attacker to elevate privileges locally.
- CVE-2026-83849Medium
Out-of-bounds read in Windows Hello allows an authorized attacker to disclose information locally.
- CVE-2026-83790High
Use after free in Windows Hello allows an authorized attacker to elevate privileges locally.
- CVE-2026-83740High
Use after free in Windows Hello allows an authorized attacker to elevate privileges locally.
- CVE-2026-70280Medium
Incorrect authorization in Windows Hello allows an authorized attacker to bypass a security feature locally.
- CVE-2026-81354High
Heap-based buffer overflow in Windows Hello allows an authorized attacker to elevate privileges locally.
- CVE-2026-72980Medium
An uncontrolled search path element in Windows Hello allows an authorized attacker to bypass a security feature locally.
- CVE-2026-69864High
A use-after-free vulnerability in Windows Hello allows an authorized attacker to elevate privileges locally.
Original NVD description (English source)
Improper input validation in Windows Hello allows an authorized attacker to bypass a security feature locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS