CVE-2026-69291

8.8

Microsoft · Windows

A heap-based buffer overflow in the Windows Volume Manager Extension Driver allows an unauthenticated, remote attacker to execute arbitrary code on the target system.

Executive summary

A heap-based buffer overflow vulnerability in the Windows Volume Manager Extension Driver could allow a remote attacker to achieve arbitrary code execution on vulnerable Windows systems.

Vulnerability

This is a heap-based buffer overflow (CWE-122) located within the Windows Volume Manager Extension Driver. The vulnerability allows an unauthenticated, remote attacker to trigger memory corruption and execute arbitrary code, provided the attacker can reach the vulnerable component.

Business impact

Successful exploitation of this vulnerability permits an attacker to execute code with elevated privileges, potentially leading to full system compromise. Given the CVSS score of 8.8, this flaw represents a significant risk to organizational data confidentiality, integrity, and availability. Compromised systems could be utilized as a foothold for lateral movement within the network or for the exfiltration of sensitive information.

Remediation

Immediate Action: Apply the relevant security updates provided by Microsoft for your specific Windows version and build number as listed in the vendor advisory.

Proactive Monitoring: Monitor system logs for unusual crashes or unexpected service restarts related to the Volume Manager Extension Driver, which may indicate attempted exploitation.

Compensating Controls: Ensure that network firewalls are configured to restrict unauthorized access to sensitive services and that endpoint protection solutions are updated to detect anomalous memory manipulation patterns.

Exploitation status

Public Exploit Available: No.

Analyst recommendation

This vulnerability presents a high risk due to the potential for remote code execution. Security teams should prioritize the deployment of the vendor-supplied patches to all affected Windows endpoints. Failure to remediate this issue promptly exposes the environment to the risk of unauthorized remote access and system-wide compromise.

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History

  1. Disclosed CVE record published
  2. Collected by CVE Brief via github
  3. Analyst report written
  4. Published in the daily brief high section

Sources