CVE-2026-58639: Microsoft SharePoint Server Spoofing Vulnerability

Q: What is the severity of CVE-2026-58639?

CVE-2026-58639 has a medium severity rating of 6.5.

Q: How do I fix CVE-2026-58639?

To fix CVE-2026-58639, apply the available security patch provided by Microsoft.

Q: What impact does CVE-2026-58639 have on Microsoft SharePoint Server?

CVE-2026-58639 allows an authorized attacker to perform spoofing via a server-side request forgery vulnerability.

Q: Which versions of SharePoint are affected by CVE-2026-58639?

CVE-2026-58639 affects Microsoft SharePoint Server, SharePoint Enterprise Server 2016, SharePoint Server Subscription Edition, and SharePoint Server 2019.

Q: What type of vulnerability is CVE-2026-58639 classified as?

CVE-2026-58639 is classified as a server-side request forgery (SSRF) vulnerability.

Published Aug 11, 2026

Updated

Microsoft SharePoint Server Spoofing Vulnerability

Other sources

Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

— Microsoft

Affected Software

6 affected componentsFixes available

Microsoft SharePoint Enterprise Server 2016<16.0.5565.1001

16.0.5565.1001

Microsoft SharePoint Server Subscription Edition<16.0.19725.20522

16.0.19725.20522

Microsoft SharePoint Server 2019<16.0.10417.20198

16.0.10417.20198

Microsoft SharePoint Server<16.0.19725.20522

Microsoft SharePoint Server=2016

Microsoft SharePoint Server=2019

Remediation

Patch Available

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58639

Event History

Aug 11, 2026

CVE Published

via Microsoft·02:00 PM

Data Sourced

via Microsoft·02:00 PM

DescriptionSeverityWeakness

Data Sourced

via Microsoft·02:00 PM

Affected Software

Updated

via Microsoft·02:00 PM

Description

CVE Published

via MITRE·05:07 PM

Data Sourced

via MITRE·05:07 PM

DescriptionSeverity

Data Sourced

via NVD·05:18 PM

RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What is the severity of CVE-2026-58639?

CVE-2026-58639 has a medium severity rating of 6.5.

How do I fix CVE-2026-58639?

To fix CVE-2026-58639, apply the available security patch provided by Microsoft.

What impact does CVE-2026-58639 have on Microsoft SharePoint Server?

CVE-2026-58639 allows an authorized attacker to perform spoofing via a server-side request forgery vulnerability.

Which versions of SharePoint are affected by CVE-2026-58639?

CVE-2026-58639 affects Microsoft SharePoint Server, SharePoint Enterprise Server 2016, SharePoint Server Subscription Edition, and SharePoint Server 2019.

What type of vulnerability is CVE-2026-58639 classified as?

CVE-2026-58639 is classified as a server-side request forgery (SSRF) vulnerability.

CVE-2026-58639: Microsoft SharePoint Server Spoofing Vulnerability

Other sources

Affected Software

Remediation

Patch Available

Event History

Don't miss critical vulnerabilities

Frequently Asked Questions

What is the severity of CVE-2026-58639?

How do I fix CVE-2026-58639?

What impact does CVE-2026-58639 have on Microsoft SharePoint Server?

Which versions of SharePoint are affected by CVE-2026-58639?

What type of vulnerability is CVE-2026-58639 classified as?

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Resources

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Frequently Asked Questions

What is the severity of CVE-2026-58639?

How do I fix CVE-2026-58639?

What impact does CVE-2026-58639 have on Microsoft SharePoint Server?

Which versions of SharePoint are affected by CVE-2026-58639?

What type of vulnerability is CVE-2026-58639 classified as?