CVE-2026-69291

CVE-2026-69291 is a heap-based buffer overflow (CWE-122) in the Windows Volume Manager Extension Driver, a component of Microsoft Windows. An unauthorized attacker can trigger the flaw remotely over a network; the CVSS vector indicates no special privileges are required, but user interaction (UI:R) is needed, suggesting the victim must take some action for the attack to complete. Successful exploitation yields arbitrary code execution with high impact on confidentiality, integrity, and availability, consistent with compromise of the driver's execution context. Any Windows system with the affected Volume Manager Extension Driver component is potentially affected, though the data does not specify which Windows releases. As of this analysis there is no public proof-of-concept, the flaw is not in CISA KEV, and EPSS assigns a modest 0.6% probability of exploitation within 30 days, so no active exploitation is known.

What to do: Apply Microsoft's security update for this CVE as part of your regular monthly patch cycle; this data does not include a specific KB or fixed version, so consult Microsoft's advisory for the definitive list of affected Windows releases and the correct update. Because exploitation requires user interaction per the CVSS vector, reinforce user awareness around unexpected system prompts and review which critical hosts have the Volume Manager Extension Driver loaded. There is no public PoC or known in-the-wild exploitation, but EPSS may shift if details emerge, so monitor for updated guidance.