CVE-2025-53771
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing ov…
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
- Vendor
- microsoft
- Product
- sharepoint server
- CVSS 3.1
- 6.5 (medium), scored by secure@microsoft.comCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- CWE
- CWE-287
- Published
- 2025-07-20
- NVD modified
- 2026-06-17
- NVD status
- Analyzed
Not in the CISA KEV catalogue at the last update.
EPSS
100% chance of exploitation in the next 30 days (percentile 99th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- msrc.microsoft.com (Vendor Advisory)
- www.bleepingcomputer.com (Press/Media Coverage)
Data last updated 18 Oct 2026. Sources: NVD API 2.0, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.