Files or Directories Accessible to External Parties in Microsoft products - CVE-2026-35440
Published: May 13, 2026
Vulnerability identifier: #VU131351
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-35440
CWE-ID: CWE-552
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 the files or directories accessible to external parties in Microsoft Word. A remote attacker can trick a victim to reply a specially crafted email and gain access to sensitive information on the system.
Affected software
Microsoft 365 Apps for Enterprise
Microsoft Office
Microsoft Word
Microsoft Office LTSC
Microsoft Office
Microsoft Word
Microsoft Office LTSC
How to mitigate CVE-2026-35440
Install updates from vendor's website.
Microsoft Word - update to 16.0.5552.1000