CVE-2025-53771

Microsoft SharePoint Server Spoofing Vulnerability

At a glance

Severity: MEDIUM 6.5
EPSS: EPSS 99.89 % · percentile 100 (2026-10-27)
State: PUBLISHED
Published: 2025-07-20
Updated: 2026-02-13
Assigner: microsoft
NVD status: Analyzed

Description

Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 6.5	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	microsoft
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	NVD · secure@microsoft.com (Secondary)

Weaknesses (CWE)

CWE-287

European references

ENISA EUVD · EUVD-2025-22040
GCVE · GCVE-0-2025-53771

CERT-FR advisories

CERTFR-2025-AVI-0611 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr
CERTFR-2025-ALE-010 — [MàJ] Multiples vulnérabilités dans Microsoft SharePoint · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:* < 16.0.18526.20508
cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*

Affected products

Product	Versions
Microsoft · Microsoft SharePoint Enterprise Server 2016	affected 16.0.0 < 16.0.5513.1001
Microsoft · Microsoft SharePoint Server 2019	affected 16.0.0 < 16.0.10417.20037
Microsoft · Microsoft SharePoint Server Subscription Edition	affected 16.0.0 < 16.0.18526.20508

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD