CVE-2026-26109

high Microsoft
CVSS v3 Base Score
8.4
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: March 10, 2026
Last Modified: March 13, 2026
Vendor: Microsoft
Source: NVD

Description

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CWE

CWE-125

Affected Products

microsoft 365 appsmicrosoft excelmicrosoft officemicrosoft office long term servicing channelmicrosoft office online server

References

🔗 msrc.microsoft.com