Vulnerability
CVE-2025-53771
Microsoft SharePoint Enterprise Server 2016: unauthenticated spoofing
Most severe levelDEFCON 4 · Moderate risk
Official data
- CVSS 3.1
- 6.5 · medium
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 - Weakness
- CWE-287
- EPSS
- 99.89% estimated probability of exploitation in the next 30 days, higher than 99% of CVEs
- CISA KEV catalogue
- No
- Published on NVD
- 20 July 2025
Sources: NVD (CVSS, weakness, publication), FIRST (EPSS), CISA (KEV catalogue).
Data read on 15 November 2026.
In DefenceLevel briefings1 day
- 6 November 2026New in the last 24 hoursDEFCON 4
Last 12 months.
The full analysis is in the briefingThe full analysis is in your archive
Why it matters now, who is affected and what to do: every day at 05:00 UTC, for subscribers.Why it matters, who is affected and what to do, as in the daily briefing.