CVE-2026-40369
Windows Kernel Elevation of Privilege Vulnerability
- Published
- May 12, 2026
- Updated
- Aug 10, 2026
- Assigning CNA
- microsoft
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 91.4%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Sources
7- CVE-2026-40369Research
Defensive technical analysis of CVE-2026-40369, a Windows kernel EoP vulnerability with a 12-byte additive write primitive. Covers root cause, exploit constraints, KASLR bypass, and detection recommendations.
- CVE-2026-40369-EXPLOITExploit
Full exploit code for CVE-2026-40369 - A Windows kernel arbitrary write vulnerability that allows browser sandbox escape from all browsers render process sandbox
- cve-2026-40369-exploitExploit
Exploit for CVE-2026-40369 that leverages kernel address leak and token forging to achieve privilege escalation in a browser sandbox environment.
Responsible use
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