ThreatCluster

CISA Alerts on Exploitation of Windows Ancillary Function Vulnerability CVE-2026-68820

First seen 14 Aug 2026, 13:29 UTC • •70

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ThreatCluster •August 15, 2026 at 12:07 UTC

•CVE-2026-68820 is a use-after-free vulnerability in Windows Ancillary Function Driver.
•CISA added the vulnerability to its Known Exploited Vulnerabilities Catalog on August 11, 2026.
•The first public proof of concept for CVE-2026-68820 was released on August 13, 2026.

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has warned of active exploitation of a Microsoft Windows vulnerability, CVE-2026-68820, which is a use-after-free flaw in the Windows Ancillary Function Driver for WinSock. This vulnerability allows an authorized attacker to elevate privileges locally. CISA added the vulnerability to its Known Exploited Vulnerabilities Catalog on August 11, 2026. The first public proof of concept (PoC) was released on August 13, 2026. Organizations using affected Windows systems are at risk, and immediate action is recommended to mitigate potential attacks. The vulnerability highlights the ongoing challenges in securing Windows environments against privilege escalation attacks.

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Timeline

2024-08-13

CVE-2024-38193 published

Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.

2026-08-11

CVE-2026-68820 added to CISA KEV

CISA included the vulnerability in its Known Exploited Vulnerabilities Catalog due to active exploitation.

Cybersecuritynews

2026-08-13

First public PoC for CVE-2026-68820 released

The first proof of concept demonstrating the exploitation of the vulnerability was made public.

Cybersecuritynews

More articles in this cluster (3)

Threat Graph

7 entities, 6 inferred relationships (STIX 2.1).

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Technique (2)

Zero-day Exploit
T1068 - Exploitation for Privilege Escalation

Vulnerability (2)

CVE-2024-38193
CVE-2026-68820

Weakness (2)

CWE-269 - Improper Privilege Management
CWE-416 - Use After Free

Affected Platform (1)

Windows

Relationships

CVE-2024-38193 targets Windows
CVE-2026-68820 targets Windows
Zero-day Exploit targets Windows
T1068 - Exploitation for Privilege Escalation targets Windows
CVE-2024-38193 related to CWE-269 - Improper Privilege Management
CVE-2024-38193 related to CWE-416 - Use After Free

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