Quick answers
- Is CVE-2026-77895 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77895 being exploited in the wild.
- How severe is CVE-2026-77895?
- High severity, with a CVSS score of 7.5, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows DHCP Server <UNKNOWN>.
- Is there a fix for CVE-2026-77895?
- 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-2026-77895 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-77895?
- Check whether you run Microsoft Windows DHCP Server at an affected version. 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 out-of-bounds read vulnerability exists in Microsoft Windows DHCP Server where specially crafted DHCP requests can trigger memory access outside allocated buffer boundaries. The vulnerability is reachable over the network without authentication; an attacker can send malicious DHCP packets to trigger the out-of-bounds read condition. Successful exploitation causes a denial of service by crashing the DHCP server process, preventing legitimate DHCP clients from obtaining leases. A patch is expected to be available through Microsoft Security Updates.
Affected products
- Microsoft Windows DHCP Server <UNKNOWN>
Timeline
- 2026-09-08: disclosed