CVE-2026-70306: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Microsoft Microsoft SharePoint Enterprise Server 2016
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.
AI Analysis
Technical Summary
This vulnerability (CWE-79) in Microsoft SharePoint Enterprise Server 2016 (version 16.0.0) allows an attacker to inject malicious scripts due to improper input neutralization during web page generation. The flaw can be exploited remotely without privileges and requires user interaction, potentially leading to complete compromise of confidentiality and integrity of affected systems. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation can result in high impact on confidentiality and integrity, enabling attackers to perform spoofing attacks and potentially execute arbitrary scripts in the context of the affected SharePoint server. Availability is not impacted. No known exploits are currently observed in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70306 to remediate this vulnerability.
CVE-2026-70306: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Microsoft Microsoft SharePoint Enterprise Server 2016
Description
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.
CVSS v3.1
Score 9.3critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-79) in Microsoft SharePoint Enterprise Server 2016 (version 16.0.0) allows an attacker to inject malicious scripts due to improper input neutralization during web page generation. The flaw can be exploited remotely without privileges and requires user interaction, potentially leading to complete compromise of confidentiality and integrity of affected systems. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation can result in high impact on confidentiality and integrity, enabling attackers to perform spoofing attacks and potentially execute arbitrary scripts in the context of the affected SharePoint server. Availability is not impacted. No known exploits are currently observed in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70306 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-04T00:01:20.931Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70306","vendor":"Microsoft"}]
Threat ID: 6a7b583cbf8831d539156725
Added to database: 08/11/2026, 17:13:32 UTC
Last enriched: 08/11/2026, 17:41:52 UTC
Last updated: 08/12/2026, 00:12:10 UTC
Views: 5
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