Microsoft SharePoint Improper Authentication Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 22/07/2025. Patch affected systems as an emergency. It is known to be used in ransomware campaigns.
| Package | Affected versions | Patched versions |
|---|---|---|
| sharepoint enterprise server | = 2016 | |
| sharepoint server | = 2019< 16.0.18526.20424 | 16.0.18526.20424 |
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
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