CVE-2026-70306: Microsoft Office SharePoint Spoofing Vulnerability
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Other sources
Microsoft Office SharePoint 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 16.0.5565.1001Patch KB5002905 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20198Patch KB5002894 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.19725.20522Patch KB5002893
Event History
Frequently Asked Questions
What is the severity of CVE-2026-70306?
The severity of CVE-2026-70306 is critical with a CVSS score of 9.3.
How does CVE-2026-70306 affect Microsoft Office SharePoint?
CVE-2026-70306 allows an unauthorized attacker to perform spoofing attacks over a network due to improper input neutralization during web page generation.
What are the potential impacts of exploiting CVE-2026-70306?
Exploiting CVE-2026-70306 may result in unauthorized access to sensitive information or manipulation of user sessions.
How do I fix CVE-2026-70306?
To fix CVE-2026-70306, apply the latest security updates for Microsoft Office SharePoint as provided by Microsoft.
Is CVE-2026-70306 a cross-site scripting vulnerability?
Yes, CVE-2026-70306 is classified as a cross-site scripting (XSS) vulnerability.