Untrusted Pointer Dereference in Microsoft products - CVE-2026-45643
Published: June 10, 2026
Vulnerability identifier: #VU134216
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-45643
CWE-ID: CWE-822
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Microsoft 365 Apps for Enterprise
Microsoft Office
Microsoft Office LTSC
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 untrusted pointer dereference in Microsoft Word. A remote attacker can trick a victim to open a specially crafted Office file and execute arbitrary code on the system.
How to mitigate CVE-2026-45643
Install updates from vendor's website.