CVE-2026-55030: 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 (CVE-2026-55030) in Microsoft SharePoint Enterprise Server 2016 is due to improper neutralization of input during web page generation, classified as CWE-79 (Cross-site Scripting). An authorized attacker could exploit this flaw to perform spoofing attacks over a network. The CVSS v3.1 base score is 4.6, indicating medium severity, with low complexity and requiring privileges and user interaction. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation could allow an authorized attacker to conduct spoofing attacks, potentially misleading users or systems by injecting malicious scripts into web pages generated by SharePoint. The confidentiality and integrity impacts are low, and availability is not affected. There are no known exploits in the wild at this time.
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 detailed in the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55030. Applying this patch will remediate the vulnerability.
CVE-2026-55030: 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 4.6medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-55030) in Microsoft SharePoint Enterprise Server 2016 is due to improper neutralization of input during web page generation, classified as CWE-79 (Cross-site Scripting). An authorized attacker could exploit this flaw to perform spoofing attacks over a network. The CVSS v3.1 base score is 4.6, indicating medium severity, with low complexity and requiring privileges and user interaction. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation could allow an authorized attacker to conduct spoofing attacks, potentially misleading users or systems by injecting malicious scripts into web pages generated by SharePoint. The confidentiality and integrity impacts are low, and availability is not affected. There are no known exploits in the wild at this time.
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 detailed in the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55030. Applying this patch will remediate the vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-16T14:12:44.285Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55030","vendor":"Microsoft"}]
Threat ID: 6a5676b068715ace43f098b6
Added to database: 07/14/2026, 17:49:36 UTC
Last enriched: 07/14/2026, 19:34:50 UTC
Last updated: 07/15/2026, 02:07:22 UTC
Views: 3
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