Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Microsoft Windows Biometric Service contains a heap-based buffer overflow affecting Windows 10 versions 1607, 1809, 21H2 and 22H2, Windows 11 versions 23H2, 24H2, 25H2 and 26H1, and Windows Server 2016, before the fixed builds listed for each. An attacker with local authenticated access can exploit it to elevate privileges. Upgrade to the fixed build for your version of Windows; the source gives no workaround.
Not analysed yet
We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.8 | High | 3.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C | CNA (microsoft) |
- CISA KEV Not listed.
- EPSS 0.0033, the 26th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 8 Sept 2026, 17:12 UTC Confirmed by the CVE List
- 31 Oct 2026, 16:20 UTC First seen by agentprime