CVE-2026-21533
HIGH Actively ExploitedWindows Remote Desktop Services Elevation of Privilege Vulnerability
CVSS v3
7.8
HIGH
EPSS Score
20.2%
exploit probability
CISA KEV
No
known exploited
Exploitation
active
SSVC status
Description
Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 2/10/2026
- Last Modified
- 3/30/2026
Frequently Asked Questions
What is CVE-2026-21533?
Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.
Is CVE-2026-21533 actively exploited?
Yes. CVE-2026-21533 has been observed in active exploitation according to SSVC analysis.
What is the CVSS score for CVE-2026-21533?
CVE-2026-21533 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string 3.1.
Is CVE-2026-21533 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.