CVE-2026-68820Privilege Escalation in Windows WinSock (afd.sys)
Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally.
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Esta vulnerabilidad en el driver afd.sys de Windows permite que un atacante con acceso limitado eleve privilegios localmente para comprometer el sistema. Se encuentra en la lista KEV de CISA debido a que está siendo explotada activamente en ataques reales. Los desarrolladores y administradores que operen entornos Windows deben priorizar la actualización del sistema operativo.
Relevant roles
Severity
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HCWE-416CISA KEV
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
EPSS
No EPSS score yet (CVE may be too fresh).
Technical description
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.