CVE-2026-88145: Microsoft Office Excel Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Other sources
Microsoft Office Excel 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 16.0.14334.20974 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases
Event History
Frequently Asked Questions
Does exploitation require an authenticated account or user interaction?
An attacker does not need privileges or authentication, and the attack can be delivered over the network. However, user interaction is required for exploitation.
Are Mac installations included in the affected software list?
Yes. The listed affected products include Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC for Mac 2024, and Microsoft Office 365 for Mac.
Can fixed versions or temporary mitigations be identified from the supplied information?
No. The supplied information does not provide fixed version numbers, update details, or compensating mitigations.