Microsoft Windows NULL Pointer Dereference Vulnerability (CVE-2026-21525)
Severity: medium · Patch status: unknown · Since 2026-02-10 · CVE-2026-21525
Microsoft Windows Remote Access Connection Manager contains a NULL pointer dereference that could allow an unauthorized attacker to deny service locally. CISA added CVE-2026-21525 to its Known Exploited Vulnerabilities catalog on Feb 10, 2026, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Mar 3, 2026 (BOD 22-01); treat that as the outer limit.
Sources
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