What is CVE-2026-88074?

CVE-2026-88074 is a high-severity vulnerability in Microsoft Windows 11 Version 23h2, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-10-13.

How severe is CVE-2026-88074?

High severity. CVSS v3 base score is 7.8 out of 10.

Integer overflow in Microsoft Windows 11 Version 23h2

CVE-2026-88074

Integer overflow or wraparound in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.

Vulnerability class: Integer Overflow

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-88074?: CVE-2026-88074 is a high-severity vulnerability in Microsoft Windows 11 Version 23h2, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-10-13.
How severe is CVE-2026-88074?: High severity. CVSS v3 base score is 7.8 out of 10.