Out-of-bounds read in Microsoft products - CVE-2026-85875

Vulnerability details

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in Microsoft Office Excel when opening a malicious Office file. A remote attacker can send a malicious Office file and convince a user to open it to disclose sensitive information.

The Preview Pane is not an attack vector.

Affected software

How to mitigate CVE-2026-85875

External References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-85875
• https://support.microsoft.com/help/5002904

Related Security Bulletins

• Multiple vulnerabilities in Microsoft Office