CVE-2026-40363HIGH 8.4EPSS p30.0%

CVE-2026-40363CVE-2026-40363

Description

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

Scoring

CVSS 3.18.4 (HIGH)
VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.38% probability of exploitation · percentile 30.0% · 2026-06-18T12:00:27Z
Published2026-05-12
Last modified2026-05-22

Underlying weaknesses· 1

CWE-122

References

  1. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40363

1

TypeTargetConfidenceTier
WeaknessHeap-based Buffer Overflowcwe-1220%live

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