CVE-2026-40420HIGH 8.8EPSS p11.4%

CVE-2026-40420CVE-2026-40420

microsoft / 365_apps

Description

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

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS0.21% probability of exploitation · percentile 11.4% · 2026-06-19T12:03:05Z
Published2026-05-12
Last modified2026-06-01

Underlying weaknesses· 1

CWE-284

References

  1. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40420

1

TypeTargetConfidenceTier
WeaknessImproper Access Controlcwe-2840%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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CVE-2026-40418
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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.