Stack-based buffer overflow in Microsoft products - CVE-2026-45463
Published: June 15, 2026
Vulnerability identifier: #VU134502
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-45463
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Microsoft Office for Android
Microsoft 365 Apps for Enterprise
Microsoft Office
Microsoft Office LTSC
Microsoft Office for Android
Microsoft 365 Apps for Enterprise
Microsoft Office
Microsoft Office LTSC
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Microsoft Office. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2026-45463
Install updates from vendor's website.