CVE-2026-88197: Microsoft Office Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over a network.
Other sources
Microsoft Office Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.17932.21056 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20974
Event History
Frequently Asked Questions
Which Microsoft Office products are listed as affected?
The affected products listed are Microsoft 365 Apps for Enterprise; Microsoft Office 365 for Mac; Office LTSC for Mac 2021 and 2024; and Office LTSC 2021 and 2024 for 32-bit and 64-bit editions.
What access does an attacker need to exploit this issue?
The CVSS vector indicates the attack can be performed over a network and does not require attacker privileges or prior authentication. It also indicates user interaction is required.