Quick answers
- Is CVE-2026-83691 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-83691 being exploited in the wild.
- How severe is CVE-2026-83691?
- High severity, with a CVSS score of 7.8, published 13 October 2026.
- Which products and versions are affected?
- Microsoft Windows DHCP Server.
- Is there a fix for CVE-2026-83691?
- 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-2026-83691 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-83691?
- Check whether you run Microsoft Windows DHCP Server. 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 DHCP Server that allows an authenticated local attacker to elevate privileges. The vulnerability requires prior authorization on the system. Successful exploitation grants the attacker elevated privileges on the DHCP server.
Affected products
- Microsoft Windows DHCP Server
Timeline
- 2026-10-13: advisory