Out-of-bounds read in Microsoft Office for macOS and Microsoft Office - CVE-2026-112720

Vulnerability details

The vulnerability allows a remote attacker to disclose information by reading small portions of heap memory.

The vulnerability exists due to an out-of-bounds read in Microsoft Office Word when processing a malicious Office file. A remote attacker can send a specially crafted Office file and convince a user to open it to disclose information from heap memory.

The Preview Pane is not an attack vector for this vulnerability.

Affected software

How to mitigate CVE-2026-112720

External References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-112720
• https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates

Related Security Bulletins

• Multiple vulnerabilities in Microsoft Office