CVE-2026-62839: Microsoft SharePoint Server Spoofing Vulnerability
Insufficiently protected credentials in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
Other sources
Microsoft SharePoint Server Spoofing Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.19725.20522Patch KB5002893 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20198Patch KB5002896 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5565.1001Patch KB5002906
Event History
Frequently Asked Questions
What is the severity of CVE-2026-62839?
CVE-2026-62839 has a medium severity rating of 6.5.
How can CVE-2026-62839 affect my system?
CVE-2026-62839 allows an authorized attacker to perform spoofing over a network due to insufficiently protected credentials.
Which software is impacted by CVE-2026-62839?
Impacted software includes Microsoft SharePoint Server Subscription Edition, Microsoft SharePoint Enterprise Server 2016, and Microsoft SharePoint Server 2019.
How do I fix CVE-2026-62839?
Fixing CVE-2026-62839 requires applying the latest security updates provided by Microsoft for the affected SharePoint versions.
What are the potential consequences of CVE-2026-62839 if exploited?
If exploited, CVE-2026-62839 can allow attackers to impersonate legitimate users and gain unauthorized access to sensitive information.