Dashboard / CVE-2026-81389

CVE-2026-81389

HIGH
MEDIUM Priority: 0.03 BB Relevance: 29/100
Published: 2026-09-08 Modified: 2026-10-30 First seen: 2026-10-30 Status: active

Attack Surface

No Auth Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local
AC: High
PR: None
UI: Required
S: Unchanged
C: High
I: High
A: High

Description

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

Weakness Classification (1)

Affected Software (9)

VendorProductVersion
Microsoft Microsoft 365 Apps for Enterprise 16.0.1 < 16.0.20326.20138
Microsoft Microsoft Excel 2016 16.0.0.0 < 16.0.5569.1003
Microsoft Microsoft Office 2016 16.0.0 < 16.0.5569.1003
Microsoft Microsoft Office 2019 19.0.0 < 16.0.10417.20207
Microsoft Microsoft Office 365 for Mac 1.0.0 < 16.113.26091433
Microsoft Microsoft Office LTSC 2021 16.0.1 < 16.0.14334.20906
Microsoft Microsoft Office LTSC 2024 16.0.0 < 16.0.17932.20976
Microsoft Microsoft Office LTSC for Mac 2021 16.0.1 < 16.113.26091433
Microsoft Microsoft Office LTSC for Mac 2024 16.0.0 < 16.113.26091433

References & Advisories (1)

Bug Bounty Relevance

29 / 100
✓ No authentication

CVSS Score

7.0 / 10.0 v3.1
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

EPSS — Exploitation Probability

0.37%
Raw Score 0.003690
Percentile 30.8%
Date 2026-10-30

Intelligence Sources

mitre ref →

External Links