CVE-2026-21525

high-risk
Published 2026-02-10

Null pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally.

Do I need to act?

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11.8% chance of exploitation in next 30 days
EPSS score — higher than 88% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.2/10 Medium
LOCAL / LOW complexity

Affected Products (20)

Affected Vendors

Microsoft

References (4)

Vendor Advisory https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21525
Third Party Advisory https://www.vicarius.io/vsociety/posts/cve-2026-21525-detection-script-dos-vulne...
Mitigation https://www.vicarius.io/vsociety/posts/cve-2026-21525-mitigation-script-dos-vuln...
US Government Resource https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-...
59
/ 100
high-risk
Severity 20/34 · Moderate
Exploitability 18/34 · Moderate
Exposure 21/34 · High