CERT-FR Flags SharePoint Privilege Escalation Flaw
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A privilege escalation vulnerability affects Microsoft SharePoint Server Subscription Edition prior to version 16.0.20326.20190; patch per Microsoft advisory.
CERT-FR issued an advisory regarding CVE-2026-88164, a privilege escalation vulnerability affecting Microsoft SharePoint Server Subscription Edition versions prior to 16.0.20326.20190. The advisory does not indicate active exploitation in the wild but recommends organizations apply the vendor-provided patches referenced in the Microsoft Security Response Center bulletin.
Defenders running affected SharePoint Server Subscription Edition deployments should prioritize patching to the fixed version to prevent local or remote attackers from escalating privileges within the environment. No further technical details, indicators of compromise, or exploitation evidence were provided in this bulletin.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1323
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