CVE-2026-44818

Published Jun 9, 2026

Last updated 10 days ago

Overview

Description
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Source
secure@microsoft.com
NVD status
Analyzed
Products
365_apps, excel, microsoft_365, office_2019, office_2021, office_2024, office_online_server

Risk scores

CVSS 3.1

Type
Secondary
Base score
7
Impact score
5.9
Exploitability score
1
Vector string
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity
HIGH

Weaknesses

secure@microsoft.com
CWE-362

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.