Quick answers
- Is CVE-2026-69266 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-69266 being exploited in the wild.
- How severe is CVE-2026-69266?
- High severity, with a CVSS score of 8.8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows DHCP Server.
- Is there a fix for CVE-2026-69266?
- 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-2026-69266 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-69266?
- 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
An integer overflow or wraparound vulnerability exists in Windows DHCP Server's packet handling logic. The vulnerability is triggered by a network-reachable attacker sending a malformed DHCP protocol message that causes an integer calculation to overflow. No authentication is required; exploitation occurs at the network boundary. A successful exploit results in remote code execution with DHCP Server privileges, typically SYSTEM-level access on Windows servers. Patches are available from Microsoft via the Security Update Guide.
Affected products
- Microsoft Windows DHCP Server
Timeline
- 2026-09-08: disclosed