What is the CVSS score of CVE-2026-21525?

CVE-2026-21525 has a CVSS 3.1 base score of 6.2 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 3.4%.

Which versions of Microsoft are affected by CVE-2026-21525?

Organizations using Null pointer dereference in Windows Remote Access Connection Manager should be aware of moderate risk from CVE-2026-21525, a null pointer dereference vulnerability rated CVSS 6.2.. A patch is available.

Is CVE-2026-21525 being actively exploited?

Yes, CVE-2026-21525 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active in-the-wild exploitation. Immediate patching is required.

How to fix or mitigate CVE-2026-21525?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Microsoft CVE-2026-21525

MEDIUM

NULL Pointer Dereference (CWE-476)

2026-02-10 secure@microsoft.com

Null Pointer Dereference Denial Of Service Microsoft

6.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.2 MEDIUM

AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Added to CISA KEV

Mar 30, 2026 - 13:28 cisa

CISA KEV

Analysis Generated

Mar 12, 2026 - 22:02 vuln.today

CVE Published

Feb 10, 2026 - 18:16 nvd

MEDIUM 6.2

DescriptionCVE.org

Null pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally.

AnalysisAI

Windows Remote Access Connection Manager contains a null pointer dereference flaw affecting Windows 10 (versions 1809 and 21h2) and Windows 11 (version 23h2) that has been confirmed as actively exploited. A local attacker can trigger a denial of service condition without requiring authentication or user interaction. No patch is currently available for this vulnerability.

Technical ContextAI

Classified as CWE-476 (NULL Pointer Dereference). Affects Windows 10 1607. Null pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally.