# CVE-2026-55051: Microsoft SharePoint SSRF information disclosure

Source: https://junglewise.ai/threats/cve-2026-55051-microsoft-sharepoint-ssrf-information-disclosure  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-14. Updated: 2026-07-14  
License: CC BY 4.0 with a link back

CVE-2026-55051 · Severity: medium · CVSS 6.5 · Published 2026-07-14

Microsoft SharePoint, a widely used collaboration and document management platform, is affected by a security vulnerability that could allow an authorized user to access sensitive information. By exploiting this flaw, an attacker with basic user permissions can force the server to make requests to internal systems that are otherwise protected from the outside world. This could lead to the exposure of internal data or configuration details, potentially aiding further attacks on the corporate network.

Technologies: [Microsoft SharePoint Enterprise Server 2016](https://junglewise.ai/threats/technologies/sharepoint-enterprise-server-2016), [Microsoft SharePoint Server 2019](https://junglewise.ai/threats/technologies/sharepoint-server-2019), [Microsoft SharePoint Server Subscription Edition](https://junglewise.ai/threats/technologies/sharepoint-server-subscription-edition). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-55051 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-55051 being exploited in the wild.

**How severe is CVE-2026-55051?** Medium severity, with a CVSS score of 6.5, published 14 July 2026.

**Which products and versions are affected?** Microsoft SharePoint Enterprise Server 2016 16.0.0 to 16.0.5561.1001; Microsoft SharePoint Server 2019 16.0.0 to 16.0.10417.20175; Microsoft SharePoint Server Subscription Edition 16.0.0 to 16.0.19725.20434.

**Is there a fix for CVE-2026-55051?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-55051 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-55051?** Check whether you run Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019 or Microsoft SharePoint Server Subscription Edition at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A Server-Side Request Forgery (SSRF) vulnerability exists in multiple versions of Microsoft SharePoint Server, including 2016, 2019, and Subscription Edition. The flaw (CWE-918) allows an authenticated attacker with low privileges to submit specially crafted requests that the server then executes. This can be used to probe internal network resources or access metadata services that the SharePoint server has access to but are not directly reachable by the attacker. The vulnerability is exploitable over the network without user interaction, though it does require valid credentials. Microsoft has released security updates to address this issue across the affected versions.

## Affected products

- Microsoft SharePoint Enterprise Server 2016 16.0.0 to 16.0.5561.1001
- Microsoft SharePoint Server 2019 16.0.0 to 16.0.10417.20175
- Microsoft SharePoint Server Subscription Edition 16.0.0 to 16.0.19725.20434

## Timeline

- 2026-07-14: advisory: Initial publication by Microsoft and NVD

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55051](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55051)

## Related threats

- [Microsoft SharePoint cross-site scripting vulnerability](https://junglewise.ai/threats/cve-2026-62826-microsoft-sharepoint-cross-site-scripting-vulnerability)
- [Microsoft SharePoint improper authorization privilege escalation](https://junglewise.ai/threats/cve-2026-58277-microsoft-sharepoint-improper-authorization-privilege-escalation)
- [Microsoft Office Out-of-bounds Read Information Disclosure](https://junglewise.ai/threats/cve-2026-56192-microsoft-office-out-of-bounds-read-information-disclosure)
- [Microsoft SharePoint improper access control spoofing vulnerability](https://junglewise.ai/threats/cve-2026-56157-microsoft-sharepoint-improper-access-control-spoofing)
- [Microsoft Office Word numeric truncation information disclosure](https://junglewise.ai/threats/cve-2026-55142-microsoft-office-word-numeric-truncation-information-disclosure)