Heap-based buffer overflow in Microsoft products - CVE-2026-45466
Published: June 10, 2026
Vulnerability identifier: #VU134215
CSH Severity: Medium
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-45466
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to a boundary error in Microsoft Word. A remote attacker can trick a victim to open a specially crafted Office file, trigger a heap-based buffer overflow and gain access to sensitive information on the target system.
Affected software
Microsoft 365 Apps for Enterprise
Microsoft Office
Microsoft Office LTSC
Microsoft Office
Microsoft Office LTSC
How to mitigate CVE-2026-45466
Install updates from vendor's website.