Microsoft SharePoint Deserialization of Untrusted Data Vulnerability . Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 22/07/2026. Patch affected systems as an emergency.
| Package | Affected versions | Patched versions |
|---|---|---|
| sharepoint server | = 2016= 2019< 16.0.19725.20434 | 16.0.19725.20434 |
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
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