Advisoriesby IbisMicrosoftCVE-2026-69777
Microsoft Windows DHCP Client: heap buffer overflow
Fix: upgrade to 10.0.26100.9445 or later (3 fixed versions below)
Heap-based buffer overflow in Windows DHCP Client allows an authorized attacker to elevate privileges over an adjacent network.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Windows 11 Version 24H2 Product | >= 10.0.26100.0, < 10.0.26100.9445 | 10.0.26100.9445 |
| Windows 11 Version 25H2 Product | >= 10.0.26200.0, < 10.0.26200.9445 | 10.0.26200.9445 |
| Windows 11 version 26H1 Product | >= 10.0.28000.0, < 10.0.28000.2954 | 10.0.28000.2954 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-122