CVE-2025-55340
Windows Remote Desktop Protocol Security Feature Bypass
Improper authentication in Windows Remote Desktop Protocol allows an authorized attacker to bypass a security feature locally.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows Remote Desktop Protocol Security Feature Bypass
Improper authentication in Windows Remote Desktop Protocol allows an authorized attacker to bypass a security feature locally.
- Record
CVE-2025-55340- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-287
- Updated
- 2026-11-02
EUVDEUVD-2025-34417
Improper authentication in Windows Remote Desktop Protocol allows an authorized attacker to bypass a security feature locally.
- Record
EUVD-2025-34417- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-mx76-c5mq-wfcc
Improper authentication in Windows Remote Desktop Protocol allows an authorized attacker to...
Improper authentication in Windows Remote Desktop Protocol allows an authorized attacker to bypass a security feature locally.
- Record
GHSA-mx76-c5mq-wfcc- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
NVD
Improper authentication in Windows Remote Desktop Protocol allows an authorized attacker to bypass a security feature locally.
- Record
CVE-2025-55340- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
- 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 11 version 25h2
- microsoft windows server 2022
- microsoft windows server 2022, 23h2 edition (server core installation)
- microsoft windows server 2025
- microsoft windows server 2025 (server core installation)
- microsoft windows 10 21h2
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-55340 is a high vulnerability (CVSS 7.0) in Microsoft Windows 10 Version 21h2, published October 14, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.31%, the 24th percentile. No source names a fixed version.