CVE-2026-21525 - Microsoft Windows
AI Vulnerability ContextNull pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally.
Overview
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CISA KEVyesWhether CISA lists this as exploited.
Techniques0AI attack methods connected to this vulnerability.
Case studies0Examples where this vulnerability is mentioned.
Vulnerability status
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CISA KEVMEDIUM
- CVE ID
- CVE-2026-21525
- Vendor/project
- Microsoft
- Product
- Windows
- Vulnerability name
- Microsoft Windows NULL Pointer Dereference Vulnerability
- Date added
- 2026-02-10
- Due date
- 2026-03-03
- Known ransomware campaign use
- Unknown
- CVSS v3
- 6.2
CWE-476
Exploit context
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Source evidence
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Original source
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NVD CVE pagehttps://nvd.nist.gov/vuln/detail/CVE-2026-21525CVE API docshttps://nvd.nist.gov/developers/vulnerabilitiesData feedshttps://nvd.nist.gov/vuln/data-feedsCataloghttps://www.cisa.gov/known-exploited-vulnerabilities-catalogData repositoryhttps://github.com/cisagov/kev-datasecure@microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21525af854a3a-2127-422b-91ae-364da2661108https://www.vicarius.io/vsociety/posts/cve-2026-21525-detection-script-dos-vulnerability-in-windows-remote-access-connection-manageraf854a3a-2127-422b-91ae-364da2661108https://www.vicarius.io/vsociety/posts/cve-2026-21525-mitigation-script-dos-vulnerability-in-windows-remote-access-connection-manager134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21525