Out-of-bounds read in Microsoft products - CVE-2026-44822
Published: June 10, 2026
Vulnerability identifier: #VU134210
CSH Severity: Medium
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-44822
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Microsoft Excel. A remote attacker can trigger an out-of-bounds read error and read contents of memory on the system.
Affected software
Office Online Server
Microsoft 365 Apps for Enterprise
Microsoft Office
Microsoft Excel
Microsoft Office LTSC
Microsoft 365 Apps for Enterprise
Microsoft Office
Microsoft Excel
Microsoft Office LTSC
How to mitigate CVE-2026-44822
Install updates from vendor's website.