High severity7.5NVD Advisory· Published Sep 8, 2026· Updated Sep 24, 2026
CVE-2026-77889
CVE-2026-77889
Description
Access of resource using incompatible type ('type confusion') in Windows DHCP Server allows an unauthorized attacker to deny service over a network.
Affected products
1Patches
Vulnerability mechanics
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77889nvdPatchVendor Advisory
News mentions
3- Patch Tuesday - September 2026Rapid7 Blog · Sep 8, 2026
- Microsoft Windows Server DHCP: 25 Vulnerabilities Disclosed, Two Exploited in the WildVypr Intelligence · Sep 8, 2026
- Massive Microsoft Patch Tuesday September 2026 – 973 Vulnerabilities Fixed, Including 2 Zero-DaysCyber Security News · Sep 8, 2026