CVE-2026-49785 Windows UEFI - Authentication Bypass

Windows UEFI contains an improper resource shutdown or release vulnerability, letting authorized local attackers bypass security features, exploit requires local authorized access.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.34% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-404

Vendor fix

Update to the latest Windows UEFI version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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