CVE-2026-42993 json
Remote Desktop Client Remote Code Execution Vulnerability
published 2026-06-09 5 mo ago modified 2026-09-24 45 d ago also EUVD-2026-35760
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 37%
- public exploits
- 0
- none known
Summary
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Patch / fix
- Microsoft Windows 10 Version 21H2 10.0.19044.7417
- Microsoft Windows 10 Version 22H2 10.0.19045.7417
- Microsoft Windows 11 version 23H2 10.0.22631.7219
- Microsoft Windows 11 Version 24H2 10.0.26100.8655
- Microsoft Windows 11 Version 25H2 10.0.26200.8655
- Microsoft Windows 11 version 26H1 10.0.28000.2269
- Microsoft Windows Server 2022 10.0.20348.5256
- Microsoft Windows Server 2025 10.0.26100.32995
- Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.32995
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 5 mo ago
Exploit prediction
0.43% chance of exploitation in the next 30 days, higher than 37% 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:N/UI:R/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:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
- 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 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-2026-42993
vendor-advisory, patch
Sources
- CVE List CVE-2026-42993
- NVD CVE-2026-42993
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.