SB2026021063 - Local denial of service in Windows Remote Access Connection Manager
Published: February 10, 2026
Security Bulletin ID
SB2026021063
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-21525)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:A/U:Green
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in Windows Remote Access Connection Manager. A local user can perform a denial of service (DoS) attack.
Note, the vulnerability is being exploited in the wild.
Remediation
Install update from vendor's website.