Threat Intelligence / CVE / CVE-2026-21525
CVE-2026-21525
CISA KEVNull pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally.
CVSS v3 vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses (CWE)
CWE-476
Threats tracking this CVE
- February 2026 Patch Tuesday: Six Zero-Days Among 59 CVEs — CRITICAL
- February 2026 Patch Tuesday: Six Zero-Days Among 59 CVEs — CrowdStrike-Discovered RDP EoP Exploited Since December 2025 — CRITICAL
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21525
- https://www.vicarius.io/vsociety/posts/cve-2026-21525-detection-script-dos-vulnerability-in-windows-remote-access-connection-manager
- https://www.vicarius.io/vsociety/posts/cve-2026-21525-mitigation-script-dos-vulnerability-in-windows-remote-access-connection-manager
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21525
Full detection coverage & IOCs for threats exploiting CVE-2026-21525 are available via the Threadlinqs MCP server (Purple tier). View plans →