Quick answers
- Is CVE-2026-83970 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-83970 being exploited in the wild.
- How severe is CVE-2026-83970?
- 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-2026-83970?
- 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-2026-83970 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-83970?
- 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, allowing an authorized local attacker to trigger memory corruption through malformed input. The vulnerability requires local access and prior authentication to the system. Successful exploitation grants elevation of privileges from user mode to system/kernel mode, enabling full control over the affected machine. Microsoft has released security patches to remediate this issue.
Affected products
- Microsoft Windows Biometric Service
Timeline
- 2026-09-08: disclosed