CVE-2025-53771: medium-severity vulnerability in Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Server Spoofing Vulnerability
Published · Updated
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72Vexday Risk Score
Patch now. It exploitation observed by VulnCheck, has an official Brazilian government alert and has a working public exploit.
ssvc Actcvss 6.5epss 100%
from disclosure to weaponsame day
Published on NVDJul 20
metasploitJul 8
VulnCheckJul 18
Official alert in Brazil
Brazil's federal government published an alert, recommendation or bulletin that cites this vulnerability.
- CISC Gov.br · 15 Jul 2025Zero-Days TOOLSHELL - SharePoint Serversread on gov.br ↗
Source: CTIR Gov (GSI) and CISC Gov.br, under the CC BY-ND 3.0 license.
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C
Affected products
Microsoft · Microsoft SharePoint Enterprise Server 2016Microsoft · Microsoft SharePoint Server 2019Microsoft · Microsoft SharePoint Server Subscription EditionRelated CVEs — Microsoft SharePoint Enterprise Server 2016
In the same product, most dangerous first.
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