Affects Windows Credential Guard on widely deployed Windows endpoints; local privilege escalation can undermine enterprise host security and credential protection.
CVE-2026-72958
Local double-free in Windows Credential Guard enabling local privilege escalation.
Is CVE-2026-72958 being exploited?
Not confirmed. CVE-2026-72958 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 0.33% probability of exploitation in the next 30 days.
How severe is CVE-2026-72958?
CVE-2026-72958 is rated High with a CVSS score of 8.2. 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-2026-72958?
Yes. A fix has been recorded for CVE-2026-72958. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-72958 affect?
CVE-2026-72958 affects Microsoft Windows Credential Guard, Windows endpoints with Credential Guard enabled. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-72958?
Apply Microsoft security update immediately; restrict local access and audit endpoints.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local attacker with access can escalate to elevated/SYSTEM privileges, bypass Credential Guard and access protected credentials.
Immediate action required
- affected>= 10.0.26100.0 and < 10.0.26100.9445
- affected>= 10.0.26200.0 and < 10.0.26200.9445
- affected>= 10.0.28000.0 and < 10.0.28000.2954
- affected>= 10.0.26100.0 and < 10.0.26100.33438
- affected>= 10.0.26100.0 and < 10.0.26100.33438
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.