CVE-2026-21525MEDIUM 6.2CISA KEVEPSS p91.1%

CVE-2026-21525Microsoft Windows NULL Pointer Dereference Vulnerability

Microsoft / Windows

Description

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

Scoring

CVSS 3.16.2 (MEDIUM)
VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS4.96% probability of exploitation · percentile 91.1% · 2026-06-18T12:00:27Z
Published2026-02-10
Last modified2026-03-30

CISA KEV entry

Added to KEV: 2026-02-10

Underlying weaknesses· 1

CWE-476

References

  1. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21525
  2. https://www.vicarius.io/vsociety/posts/cve-2026-21525-detection-script-dos-vulnerability-in-windows-remote-access-connection-manager
  3. https://www.vicarius.io/vsociety/posts/cve-2026-21525-mitigation-script-dos-vulnerability-in-windows-remote-access-connection-manager
  4. https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21525

1

TypeTargetConfidenceTier
WeaknessNULL Pointer Dereferencecwe-4760%live

(incoming)1

TypeTargetConfidenceTier
KEVEntryMicrosoft Windows NULL Pointer Dereference Vulnerabilitykev-cve-2026-215250%live

Related by meaning· 6

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Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.