CVE detail
CVE-2026-21525: Microsoft Windows NULL Pointer Dereference Vulnerability
Source: CISA Known Exploited Vulnerabilities catalog · back to feed
Vendor / product
Microsoft · Windows
- Date added (KEV)
- Feb 10, 2026
- CISA due date
- Mar 03, 2026
- Ransomware campaign use
- Unknown
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Scorifya interpretation
AI-generatedA short, structured read of the record above, generated when this page first loads, then cached for a week.
Plain English
Technical detail
From CISA
Microsoft Windows Remote Access Connection Manager contains a NULL pointer dereference that could allow an unauthorized attacker to deny service locally.
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21525 ; https://nvd.nist.gov/vuln/detail/CVE-2026-21525
See what attackers can see on your domain
This vulnerability is on CISA's Known Exploited Vulnerabilities list, so it is being exploited in the wild right now. Scorifya can't test for Microsoft directly, but in about 30 seconds it shows what your own domain exposes publicly across TLS, security headers, DNS, and cookies: the surface attackers probe first.
SOC 2 compliance
Tracking remediation across your cloud infrastructure?
Scorifya Controls automates 54 SOC 2 checks across AWS, GitHub, GCP, and Azure, and gives you a manual evidence trail for the controls no tool can automate. Self-hosted, three tiers from $99/mo.
See Scorifya Controls →References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21525Vendor Advisory
- https://www.vicarius.io/vsociety/posts/cve-2026-21525-mitigation-script-dos-vulnerability-in-windows-remote-access-connection-managerMitigationThird Party Advisory
- https://www.vicarius.io/vsociety/posts/cve-2026-21525-detection-script-dos-vulnerability-in-windows-remote-access-connection-managerThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21525US Government Resource
Other recent CVEs from Microsoft
- CVE-2026-58644SharePoint, Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
- CVE-2026-56155Active Directory Federation Services, Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability
- CVE-2026-56164SharePoint Server, Microsoft SharePoint Server Missing Authentication for Critical Function Vulnerability
- CVE-2026-45659SharePoint Server, Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability
- CVE-2008-4250Windows, Microsoft Windows Buffer Overflow Vulnerability