CVE-2025-53771: Microsoft SharePoint Server Spoofing Vulnerability
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-01 19:19 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Description quoted from the CVE record (assigned by microsoft, published 2025-07-20).
Weakness: CWE-287: Improper Authentication
How it can be exploited
Exploitable over the network with low attack complexity needing no privileges and no user interaction. Impact: confidentiality low, integrity low, availability none. 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
CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: yes. Technical impact: partial.
Public exploit evidence (Exploit Observer)
Also known as: BDU:2025-08787, CNNVD-202507-2591, EUVD-2025-22040, GHSA-6pmq-337c-gv96, ZDI-25-652
VEDAS cluster: VEDAS:DRAGONWISP
Exploit Observer links 1 piece of public exploit code or detection modules that name this CVE or one of its aliases.
Exploit code and modules (1)
Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.
- Nuclei template: https://raw.githubusercontent.com/projectdiscovery/nuclei-templates/main/http/cves/2025/CVE-2025-53771.yaml
Research and write-ups (2)
- Research or write-up: https://www.trendmicro.com/en_us/research/25/g/cve-2025-53770-and-cve-2025-53771-sharepoint-attacks.html
- Research or write-up: https://www.zerodayinitiative.com/advisories/ZDI-25-652
Vulnerability databases and vendor advisories (7)
Catalogue entries, not exploit evidence.
- Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2025-22040
- Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-6pmq-337c-gv96
- Vulnerability database or vendor advisory: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-53771
- Vulnerability database or vendor advisory: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-53771)
- Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-53771
- Vulnerability database or vendor advisory: https://www.cnnvd.org.cn/home/globalSearch?keyword=CNNVD-202507-2591
- Vulnerability database or vendor advisory: https://www.tenable.com/cve/CVE-2025-53771
News (1)
183 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.
VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.
Live scores
- EPSS
- 0.999
very likely to be attacked soon - VEDAS
- 0.977
strong exploit evidence - On CISA KEV
- Not listed
- Detection rule
- None yet
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| Microsoft Microsoft SharePoint Enterprise Server 2016 | from 16.0.0 before 16.0.5513.1001 | Not stated |
| Microsoft Microsoft SharePoint Server 2019 | from 16.0.0 before 16.0.10417.20037 | Not stated |
| Microsoft Microsoft SharePoint Server Subscription Edition | from 16.0.0 before 16.0.18526.20508 | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
Exploit Observer also maps it to: microsoft sharepoint_server, microsoft_corp microsoft_sharepoint_enterprise_server_2016, microsoft_corp microsoft_sharepoint_server_2019, microsoft_corp microsoft_sharepoint_server_subscription_edition.
How to fix it
Fixed versions stated in the CVE record: 16.0.5513.1001, 16.0.10417.20037, 16.0.18526.20508.
Vendor guidance:
- Microsoft SharePoint Server Spoofing Vulnerability (vendor-advisory, patch)
How to detect it
There is no open VEDAS detection rule for this bug yet. It is listed on the detection gaps page if CISA has confirmed attacks.
Advisories on this CVE
References
Vendor advisories and patches
- Microsoft SharePoint Server Spoofing Vulnerability (vendor-advisory, patch)
Other references
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.