- Medium 6.2
- Known exploited (CISA KEV)
CVE-2026-21525
Null pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally.
Scores
The facts
- Published
- 10 February 2026
- Last changed
- 17 June 2026
- NVD status
- Analyzed
- Severity
- Medium, CVSS 6.2 out of 10 (version 3.1)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- Affects
- microsoft windows 10 1607
- microsoft windows 10 1809
- microsoft windows 10 21h2
- microsoft windows 10 22h2
- microsoft windows 11 23h2
- Known exploited
- Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 10 February 2026.
- EPSS
- 4.8% chance of exploitation activity in the next 30 days (percentile 92).
Is there a Securelyn advisory?
Not yet. Securelyn writes plain-English advisories for the flaws that matter most to businesses. Subscribe to the digest to hear about them.