Vulnerability in Microsoft Remote Desktop Client For Windows
CVE-2021-38666
Remote Desktop Client Remote Code Execution Vulnerability
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.152 (96.7th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.151 · newest: 0.152 · change: +0.001
Affected products
- Microsoft Remote Desktop Client For Windows
- Microsoft Windows 10 — versions 20h2, 21h1, 1607
- Microsoft Windows 10 Version 1507 — versions 10.0.0
- Microsoft Windows 10 Version 1607 — versions 10.0.0
- Microsoft Windows 10 Version 1809 — versions 10.0.0
- Microsoft Windows 10 Version 1909 — versions 10.0.0
- Microsoft Windows 10 Version 2004 — versions 10.0.0
- Microsoft Windows 10 Version 20h2 — versions 10.0.0
- Microsoft Windows 10 Version 21h1 — versions 10.0.0
- Microsoft Windows 11
Public proof-of-concept exploits
References
- af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
- msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38666 (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2021-38666?
- CVE-2021-38666 is a high-severity vulnerability in Microsoft Remote Desktop Client For Windows. CVSS score: 8.8/10. Published 2021-11-10.
- How severe is CVE-2021-38666?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-38666 known to be exploited?
- 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.