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CVE-2026-40420

8.8 HIGH

Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally

Published: 2026-05-12 · Last updated: 2026-06-01

Severity and scoring

CVSS
8.8 HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
CWE-284

Affected products

VendorProduct
microsoft365_apps, office, office_long_term_servicing_channel

Description

Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.

Source: NVD

References

Related CVEs

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  • CVE-2026-49161 — Improper access control in Microsoft PC Manager allows an authorized attacker to bypass a security feature locally (7.8 HIGH)
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