Quick answers
- Is CVE-2026-83987 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-83987 being exploited in the wild.
- How severe is CVE-2026-83987?
- High severity, with a CVSS score of 7.8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows Biometric Service.
- Is there a fix for CVE-2026-83987?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-83987 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-83987?
- Check whether you run Microsoft Windows Biometric Service. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A heap-based buffer overflow exists in Windows Biometric Service, triggered when processing specially crafted biometric input data. The vulnerability requires the attacker to already have local access to the system but does not require elevated privileges initially. Successful exploitation allows arbitrary code execution in the security context of the Biometric Service, enabling privilege escalation to SYSTEM level. The vulnerability is classified as high severity with a CVSS score of 7.8 and has not been observed exploited in the wild as of the advisory date. A security patch is expected from Microsoft.
Affected products
- Microsoft Windows Biometric Service
Timeline
- 2026-09-08: disclosed