CVE-2025-49706 | BDVDB-2026-285487 Detail

MicrosoftMicrosoft SharePoint Enterprise Server 2016

Description#

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

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-287 Improper Authentication

References#

Exploit#

No public exploit known

History#

Version 12025-07-08Record published in the CVE List.
Version 22026-08-04Most recent update recorded in the CVE List.

Published

Published: 2025-07-08
Last modified: 2026-08-04

Vendor information

Vendor: Microsoft
Product: Microsoft SharePoint Enterprise Server 2016

All Microsoft vulnerabilities

Score

6.5 Medium

EPSS

99.0%, Very High

Estimated chance of exploitation in the next 30 days. EPSS percentile: 99.9.

KEV

Yes

Listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Authentication Issues

Action

Disconnect public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS) to include SharePoint Server 2013 and earlier versions. For supported versions, please follow the mitigations according to CISA (URL listed below in Notes) and vendor instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.

Affected Systems

Vulnerable
>= 16.0.0 and < 16.0.5508.1000
Fixed
16.0.5508.1000

Scoring System

CVSS v4.0

Not available

CVSS v3.1

6.5 Medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:F/RL:O/RC:C

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).