CVE-2026-21245
7.8
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability: 1.8 / Impact: 5.9
Source: secure@microsoft.com
Description
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Affected (5)
Products: Microsoft: Windows 11 24h2, Windows 11 25h2, Windows Server 2025
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| Before 10.0.26100.7781 | |
| Before 10.0.26200.7781 | |
| Before 10.0.26100.32313 |
Related CWEs
CWE-122
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
CWE-787
Out-of-bounds Write
The product writes data past the end, or before the beginning, of the intended buffer.
References (1)
Source: secure@microsoft.com
Vendor Advisory
Timeline
No history available yet.