CVE-2026-21525—Microsoft Windows NULL Pointer Dereference Vulnerability

PUBLISHEDvulnerability record
2026-02-10 · last modified February 10, 2026

Metadata

CVE ID:
CVE-2026-21525
Project:
Microsoft
Product:
Windows
Date Added:
2026-02-10
Due Date:
2026-03-03
Last Updated:
February 10, 2026

Vulnerability Name

Microsoft Windows NULL Pointer Dereference Vulnerability

Description

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

Known To Be Used in Ransomware Campaigns?

Ransomware Status:
Unknown

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.

Additional Notes

  • https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21525
  • https://nvd.nist.gov/vuln/detail/CVE-2026-21525

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