Network-exploitable remote code execution in a core Windows driver (Volume Manager). High CVSS 9.8 and impacts widely deployed Microsoft Windows—widespread, high-impact vulnerability.
CVE-2026-85928
Heap overflow in Windows Volume Manager driver enables remote code execution.
Is CVE-2026-85928 being exploited?
Not confirmed. CVE-2026-85928 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.65% probability of exploitation in the next 30 days.
How severe is CVE-2026-85928?
CVE-2026-85928 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-85928?
Yes. A fix has been recorded for CVE-2026-85928. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-85928 affect?
CVE-2026-85928 affects Microsoft Windows (Volume Manager Extension Driver), See Microsoft advisory for exact affected versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-85928?
Install Microsoft's security update immediately; isolate/segment unpatched hosts.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution as SYSTEM via a network-triggered heap overflow in the Windows Volume Manager driver.
Immediate action required