CVE-2025-53771

highpriority · attend · 45EPSS 0.999 · 100 %ileexploit · weaponizedDEEUNLRUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · weaponized

Likely / severe?

99.9% (100th) EPSS

CVSS 7.1 · high

Is it mine?

26 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedMicrosoft SharePoint Enterprise Server 2016msrc_csaf
16.0.5513.1001:Security Update:https://support.microsoft.com/help/5002759
https://support.microsoft.com/help/5002759
FixedMicrosoft SharePoint Server 2019msrc_csaf
16.0.10417.20037:Security Update:https://support.microsoft.com/help/5002753
https://support.microsoft.com/help/5002753
FixedMicrosoft SharePoint Server Subscription Editionmsrc_csaf
16.0.18526.20508:Security Update:https://www.microsoft.com/en-us/download/details.aspx?id=108285
https://www.microsoft.com/en-us/download/details.aspx?id=108285

cvss

Technical severity, 0–10. One row per scoring source.

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.1

v3.17.1highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:Csecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · secure@microsoft.com USexploitability 3.9 · impact 2.5

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:Hsecondary · CVSS-BT (t0sche)

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-22USCWE-287USCWE-287USCWE-707USCWE-707US

exploits (1)

Public proof-of-concept and weaponised exploit code.

exploit/windows/http/sharepoint_toolpane_rceMicrosoft SharePoint Server ToolPane Unauthenticated Remote Code Execution (aka ToolShell)weaponized · metasploit

affected products (26)

Products and version ranges known to be affected.

Microsoft SharePoint Server 2016all versionscert_bundDEcpe:/a:microsoft:sharepoint_server_2016:-
Microsoft SharePoint Server 2016 <KB5002744 Build 16.0.5508.1000all versionscert_bundDE
Microsoft SharePoint Server 2019 <KB5002741 Build 16.0.10417.20027all versionscert_bundDE
Microsoft SharePoint Server 2016< KB5002744 Build 16.0.5508.1000cert_bundDE
Microsoft SharePoint Server 2019< KB5002741 Build 16.0.10417.20027cert_bundDE
Microsoft Microsoft SharePoint Enterprise Server 201616.0.0 → 16.0.5513.1001enisa_euvdEU
Microsoft Microsoft SharePoint Server 201916.0.0 → 16.0.10417.20037enisa_euvdEU
Microsoft Microsoft SharePoint Server Subscription Edition16.0.0 → 16.0.18526.20508enisa_euvdEU
Microsoft Corp Microsoft SharePoint Enterprise Server 2016all versionsfstec_bduRU
Microsoft Corp Microsoft SharePoint Server 2019all versionsfstec_bduRU
Microsoft Corp Microsoft SharePoint Server Subscription Editionall versionsfstec_bduRU
Microsoft SharePoint Enterprise Server 2016all versionsfixedmsrc_csafUS
Microsoft SharePoint Enterprise Server 2016< 16.0.5513.1001msrc_csafUS
Microsoft SharePoint Server 2019all versionsfixedmsrc_csafUS
Microsoft SharePoint Server 2019< 16.0.10417.20037msrc_csafUS
Microsoft SharePoint Server Subscription Editionall versionsfixedmsrc_csafUS
Microsoft SharePoint Server Subscription Edition< 16.0.18526.20508msrc_csafUS
Microsoft SharePoint Enterprise Server 2016≤ vers:microsoft/unknownncsc_nlNLcpe:2.3:a:microsoft:sharepoint_server_2016:*:*:*:*:enterprise:*:*:*
Microsoft SharePoint Server 2019≤ vers:microsoft/unknownncsc_nlNLcpe:2.3:a:microsoft:sharepoint_server_2019:*:*:*:*:*:*:*:*
sharepoint_server≤ vers:microsoft/unknownncsc_nlNLcpe:2.3:a:microsoft:sharepoint_server:-:*:*:*:subscription:*:*:*

showing 20 of 26

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2025-0233Zeroday-kwetsbaarheden ontdekt in Microsoft SharePoint ServerNL2025-07-20csaf · ncsc_nlNL
Microsoft heeft informatie vrijgegeven over actief misbruikte zeroday-kwetsbaarheden in on-premises versies van Microsoft SharePoint Server. Sharepoint Online (onderdeel van Microsoft 365) is niet getroffen.
WID-SEC-W-2025-1598Microsoft SharePoint (On-premises): Mehrere SchwachstellenDeutsch2025-07-20csaf · cert_bundDE
Ein entfernter anonymer oder authentifizierter Angreifer kann mehrere Schwachstellen in Microsoft SharePoint Server 2019, Microsoft SharePoint Subscription Edition und Microsoft SharePoint Server 2016 ausnutzen, um beliebigen Code auszuführen und Spoofing-Angriffe durchzuführen.
msrc_CVE-2025-53771Microsoft SharePoint Server Spoofing Vulnerability2025-07-08csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund msrc_csaf ncsc_nl NVD CVE.org MITRE

published 2025-07-20modified 2026-06-17

references (6)

External citations — patches, advisories, analysis.

scry

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