CVE-2025-26634 json
Windows Core Messaging Elevation of Privileges Vulnerability
published 2025-03-11 19 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-7698
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 52%
- public exploits
- 0
- none known
Summary
Heap-based buffer overflow in Windows Core Messaging allows an authorized attacker to elevate privileges over a network.
Patch / fix
- Microsoft Windows 10 Version 1507 10.0.10240.20915
- Microsoft Windows 10 Version 1607 10.0.14393.7785
- Microsoft Windows 10 Version 1809 10.0.17763.6893
- Microsoft Windows 10 Version 21H2 10.0.19044.5487
- Microsoft Windows 10 Version 22H2 10.0.19045.5487
- Microsoft Windows 11 version 22H2 10.0.22621.4890
- Microsoft Windows 11 version 22H3 10.0.22631.4890
- Microsoft Windows 11 Version 23H2 10.0.22631.4890
- Microsoft Windows 11 Version 24H2 10.0.26100.3194
- Microsoft Windows Server 2016 10.0.14393.7785
- Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.7785
- Microsoft Windows Server 2019 10.0.17763.6893
- Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.6893
- Microsoft Windows Server 2022 10.0.20348.3207
- Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1425
- Microsoft Windows Server 2025 10.0.26100.3194
- Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.3194
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 19 mo ago
Exploit prediction
0.67% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Windows 10 Version 1507
- Microsoft Windows 10 Version 1607
- Microsoft Windows 10 Version 1809
- Microsoft Windows 10 Version 21H2
- Microsoft Windows 10 Version 22H2
- Microsoft Windows 11 version 22H2
- Microsoft Windows 11 version 22H3
- Microsoft Windows 11 Version 23H2
- Microsoft Windows 11 Version 24H2
- 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 2022, 23H2 Edition (Server Core installation)
- 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-2025-26634
vendor-advisory, patch
Sources
- CVE List CVE-2025-26634
- NVD CVE-2025-26634
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.