CVE-2025-55340 — Improper Authentication in Microsoft Windows 10 Version 21h2

CWE-287 — Improper Authentication4 documents4 sources
Severity
7.0HIGHNVD
EPSS
0.0%
top 88.79%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
16
Microsoft Windows 10 Version 21h2Microsoft Windows 10 Version 22h2Microsoft Windows 11 Version 22h2+13 more
Timeline
PublishedOct 14

Description

Improper authentication in Windows Remote Desktop Protocol allows an authorized attacker to bypass a security feature locally.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.0 | Impact: 5.9

Affected Packages16 packages

▶NVDmicrosoft/windows< 10.0.20348.4294+2
▶NVDmicrosoft/windows_10_21h2< 10.0.19044.6456
▶NVDmicrosoft/windows_10_22h2< 10.0.19045.6456
▶NVDmicrosoft/windows_11_22h2< 10.0.22621.6060
▶NVDmicrosoft/windows_11_23h2< 10.0.22631.6060

🔴Vulnerability Details

2
GHSA
GHSA-mx76-c5mq-wfcc: Improper authentication in Windows Remote Desktop Protocol allows an authorized attacker to bypass a security feature locally↗2025-10-14
▶
CVEList
Windows Remote Desktop Protocol Security Feature Bypass↗2025-10-14
▶

📋Vendor Advisories

1
Microsoft
Windows Remote Desktop Protocol Security Feature Bypass↗2025-10-14
▶
CVE-2025-55340 — Improper Authentication in Microsoft | cvebase