CVE-2026-88166: Microsoft Office SharePoint Remote Code Execution Vulnerability
Integer overflow or wraparound in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Other sources
Microsoft Office SharePoint 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 16.0.20326.20190Patch KB5002927
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must be authorized in Microsoft SharePoint Server Subscription Edition and able to reach the affected SharePoint instance over the network. The available information does not indicate that unauthenticated attackers can exploit it.
What level of impact could successful exploitation have?
Successful exploitation may allow remote code execution. The supplied severity vector indicates high impact to confidentiality, integrity, and availability.
Is user interaction required for exploitation?
No user interaction is required according to the supplied severity vector. The attacker does need low-level privileges, reflected by PR:L.