Microsoft Patches Windows Flaw Causing VPN Disruptions
ID: 5267012b-ba4d-53eb-830d-cb26d51ac031
STIX ID: report--5267012b-ba4d-53eb-830d-cb26d51ac031
Feed Name: TechRepublic Security
Threat Score
Microsoft patched CVE-2026-21525, a NULL-pointer dereference in the Windows RasMan service that can crash the service and disrupt VPN/remote access; active exploitation has been confirmed. The advisory explains the technical cause, potential operational impact for organizations relying on VPNs, and provides mitigation guidance including patch deployment, monitoring for RasMan crashes, reducing local attack surface, and applying application control.
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