CVE-2026-55019: 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. The flaw could enable spoofing attacks over a network. The CVSS 3.1 base score is 4.6 (medium severity), reflecting low confidentiality and integrity impact with no availability impact. Microsoft has released an official fix for this issue.
Potential Impact
An authorized attacker could exploit this vulnerability to conduct cross-site scripting attacks, potentially leading to spoofing and limited confidentiality and integrity impacts within the affected SharePoint environment. There is no known exploitation 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 advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55019 to remediate this vulnerability.
CVE-2026-55019: 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 (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. The flaw could enable spoofing attacks over a network. The CVSS 3.1 base score is 4.6 (medium severity), reflecting low confidentiality and integrity impact with no availability impact. Microsoft has released an official fix for this issue.
Potential Impact
An authorized attacker could exploit this vulnerability to conduct cross-site scripting attacks, potentially leading to spoofing and limited confidentiality and integrity impacts within the affected SharePoint environment. There is no known exploitation 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 advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55019 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-16T14:12:44.284Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55019","vendor":"Microsoft"}]
Threat ID: 6a5676af68715ace43f09873
Added to database: 07/14/2026, 17:49:35 UTC
Last enriched: 08/13/2026, 15:29:30 UTC
Last updated: 08/25/2026, 22:52:12 UTC
Views: 59
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