8.8high
CVE-2026-69918
Windows Core Messaging Elevation of Privilege Vulnerability
Published 24 d ago · modified 6 d ago · JSON
CVSS
8.8
v3.1 · CNA
CISA KEV
No
not known exploited
EPSS
0.4%
percentile 35%
Public exploits
0
none known
Summary
Heap-based buffer overflow in Windows Core Messaging allows an authorized attacker to elevate privileges locally.
CISA SSVC assessment
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 24 d ago
Exploit prediction (EPSS)
0.41% probability of exploitation in the next 30 days, higher than 35% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Windows 10 Version 1607
- Microsoft Windows 10 Version 1809
- Microsoft Windows 10 Version 21H2
- Microsoft Windows 10 Version 22H2
- Microsoft Windows 11 version 23H2
- Microsoft Windows 11 Version 24H2
- Microsoft Windows 11 Version 25H2
- Microsoft Windows 11 version 26H1
- Microsoft Windows 11 Version 26H2
- Microsoft Windows Server 2016
- Microsoft Windows Server 2016 (Server Core installation)
- Microsoft Windows Server 2019
- Microsoft Windows Server 2019 (Server Core installation)
- Microsoft Windows Server 2022
- Microsoft Windows Server 2025
- Microsoft Windows Server 2025 (Server Core installation)
Classification
- Weakness
- CWE-122 Heap-based Buffer Overflow
References
- msrc.microsoft.com /update-guide/vulnerability/CVE-2026-69918 · vendor-advisory, patch
Sources
- CVE List: CVE-2026-69918
- NVD: CVE-2026-69918
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