CVE-2026-69777
High
Description
Heap-based buffer overflow in Windows DHCP Client allows an authorized attacker to elevate privileges over an adjacent network.
SeverityHigh
CVSS8.0
Exploit probability—
Product
Microsoft Windows
PublishedSep 8, 2026
First seenSep 8, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- microsoft windows_11_24h210.0.26100.9445 or later
- microsoft windows_11_25h210.0.26200.9445 or later
- microsoft windows_11_26h110.0.28000.2954 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_11_24h2 | v < 10.0.26100.9445 | 10.0.26100.9445 |
| microsoft windows_11_25h2 | v < 10.0.26200.9445 | 10.0.26200.9445 |
| microsoft windows_11_26h1 | v < 10.0.28000.2954 | 10.0.28000.2954 |
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