CVE-2026-55126: 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 authorized 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 authorized attacker to exploit improper input neutralization during web page generation, resulting in cross-site scripting (XSS). This can enable spoofing attacks over a network. The CVSS v3.1 base score is 7.3, indicating high severity with high impact on confidentiality and integrity but no impact on availability. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation could allow an authorized attacker to execute arbitrary scripts in the context of the affected SharePoint site, potentially leading to spoofing attacks and compromise of sensitive information. The confidentiality and integrity of data can be impacted, but availability is not affected.
Mitigation Recommendations
An official fix is available from Microsoft. Users of Microsoft SharePoint Enterprise Server 2016 version 16.0.0 should apply the vendor-provided patch as soon as possible. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55126 for detailed remediation instructions.
CVE-2026-55126: 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 authorized attacker to perform spoofing over a network.
CVSS v3.1
Score 7.3high
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 authorized attacker to exploit improper input neutralization during web page generation, resulting in cross-site scripting (XSS). This can enable spoofing attacks over a network. The CVSS v3.1 base score is 7.3, indicating high severity with high impact on confidentiality and integrity but no impact on availability. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation could allow an authorized attacker to execute arbitrary scripts in the context of the affected SharePoint site, potentially leading to spoofing attacks and compromise of sensitive information. The confidentiality and integrity of data can be impacted, but availability is not affected.
Mitigation Recommendations
An official fix is available from Microsoft. Users of Microsoft SharePoint Enterprise Server 2016 version 16.0.0 should apply the vendor-provided patch as soon as possible. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55126 for detailed remediation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-16T15:03:49.680Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55126","vendor":"Microsoft"}]
Threat ID: 6a5676b568715ace43f0ab10
Added to database: 07/14/2026, 17:49:41 UTC
Last enriched: 08/13/2026, 15:38:53 UTC
Last updated: 08/28/2026, 11:04:20 UTC
Views: 93
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