CVE-2026-77888
High
Description
Access of resource using incompatible type ('type confusion') in Windows DHCP Server allows an unauthorized attacker to deny service over a network.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Microsoft Windows
PublishedSep 8, 2026
First seenSep 8, 2026
Weakness typeCWE-843CWE-843
How to fix
Update
- microsoft windows_10_160710.0.14393.9512 or later
- microsoft windows_10_180910.0.17763.9245 or later
- microsoft windows_server_201610.0.14393.9512 or later
- microsoft windows_server_201910.0.17763.9245 or later
- microsoft windows_server_202210.0.20348.5622 or later
- microsoft windows_server_202510.0.26100.33438 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_10_1607 | v < 10.0.14393.9512 | 10.0.14393.9512 |
| microsoft windows_10_1809 | v < 10.0.17763.9245 | 10.0.17763.9245 |
| microsoft windows_server_2012 | No range specified, r2 | — |
| microsoft windows_server_2016 | v < 10.0.14393.9512 | 10.0.14393.9512 |
| microsoft windows_server_2019 | v < 10.0.17763.9245 | 10.0.17763.9245 |
| microsoft windows_server_2022 | v < 10.0.20348.5622 | 10.0.20348.5622 |
| microsoft windows_server_2025 | v < 10.0.26100.33438 | 10.0.26100.33438 |
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