CVE-2026-45453: 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 (CVE-2026-45453) affects Microsoft SharePoint Enterprise Server 2016 version 16.0.0. It is classified as CWE-79, indicating improper neutralization of input during web page generation, which leads to cross-site scripting (XSS). The vulnerability allows an attacker without privileges to execute spoofing attacks remotely by injecting malicious scripts. The CVSS v3.1 base score is 5.4 (medium severity), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality and integrity. Microsoft has released an official fix for this vulnerability.
Potential Impact
An attacker can exploit this XSS vulnerability to perform spoofing attacks, potentially deceiving users or stealing information by injecting malicious scripts into web pages generated by SharePoint. The impact affects confidentiality and integrity but does not affect availability. No known exploits in the wild have been reported.
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 Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45453 to remediate this vulnerability.
CVE-2026-45453: 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 5.4medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-45453) affects Microsoft SharePoint Enterprise Server 2016 version 16.0.0. It is classified as CWE-79, indicating improper neutralization of input during web page generation, which leads to cross-site scripting (XSS). The vulnerability allows an attacker without privileges to execute spoofing attacks remotely by injecting malicious scripts. The CVSS v3.1 base score is 5.4 (medium severity), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality and integrity. Microsoft has released an official fix for this vulnerability.
Potential Impact
An attacker can exploit this XSS vulnerability to perform spoofing attacks, potentially deceiving users or stealing information by injecting malicious scripts into web pages generated by SharePoint. The impact affects confidentiality and integrity but does not affect availability. No known exploits in the wild have been reported.
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 Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45453 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T16:06:43.096Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45453","vendor":"Microsoft"}]
Threat ID: 6a284cd78dd33fbd85664bf8
Added to database: 06/09/2026, 17:26:47 UTC
Last enriched: 07/29/2026, 21:54:06 UTC
Last updated: 07/31/2026, 21:26:44 UTC
Views: 51
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.