Out-of-bounds read in Microsoft Office - CVE-2026-69922

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 accessing memory. A remote attacker can read small portions of heap memory to disclose sensitive information.

User interaction is required for exploitation.

Affected software

How to mitigate CVE-2026-69922

External References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-69922
• https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates

Related Security Bulletins

• Out-of-bounds read in Microsoft Office