Exploited vulnerability

CVE-2026-21525

TLP:CLEAR

Microsoft Windows NULL Pointer Dereference Vulnerability

Microsoft Windows Remote Access Connection Manager contains a NULL pointer dereference that could allow an unauthorized attacker to deny service locally.

Facts

Vendor: Microsoft
Product: Windows
CVSS: 6.2
EPSS (probability of exploitation within 30 days): 4.9 %
On CISA's Known Exploited Vulnerabilities list since: 10 February 2026
First known exploitation: 10 February 2026
CISA's deadline for US federal agencies: 3 March 2026
Weakness: CWE-476
First seen by Risk Letters: 10 February 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD