CVE-2025-53771: Microsoft SharePoint Enterprise Server 2016 (Medium, CVSS 6.5)
Detection content in our coverage: IOCs
CVE-2025-53771MediumPublic exploitMicrosoft SharePoint Enterprise Server 2016
- CVSS
- 6.5 Medium (v3.1)
- EPSS
- 99.9% chance of exploitation in the next 30 days (higher than 99.9% of CVEs)
- Exploited in the wild
- Not on CISA’s KEV list
- Public exploit
- Yes, reported in a Metasploit module and a Nuclei template
- Weakness
- CWE-287
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N- Published
- Jul 20, 2025
What it is
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Description from the National Vulnerability Database.
What to do
Check whether you run Microsoft SharePoint Enterprise Server 2016, then apply the vendor’s fix or mitigation from the advisories below. Because this flaw is exploited or has public exploit code, treat it as urgent and check for signs of compromise, not just the patch level.
Advisories and fixes
ThreatRoundup coverage
MediumCVE-2025-53770CVE-2025-53771+1 CVEs 4 Hunt LeadsIOCsRemote AttackerStorm-2603WarlockKaspersky Securelist
Storm-2603 Hid a SharePoint Webshell in Memory, Then Reached for Warlock
Sources: NVD, FIRST EPSS, CISA KEV, and public exploit databases (availability only). ThreatRoundup reports whether public exploit code exists but never links to it: fake proof-of-concepts that infect security researchers are common. This page updates automatically.