CVE-2026-62829: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Microsoft Microsoft SharePoint Server 2019
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-2026-62829) in Microsoft SharePoint Server 2019 (version 16.0.0) is classified as CWE-79, indicating improper neutralization of input during web page generation leading to cross-site scripting (XSS). The flaw allows an attacker with authorized access to inject malicious scripts that can spoof content over a network. The CVSS 3.1 base score is 4.6 (medium), reflecting low complexity and limited impact on confidentiality and integrity, with no impact on availability. Microsoft has released an official fix for this vulnerability.
Potential Impact
An authorized attacker can exploit this XSS vulnerability to perform spoofing attacks over the network, potentially misleading users or executing unauthorized scripts in the context of the victim's browser. The impact is limited to partial confidentiality and integrity loss, with no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users of Microsoft SharePoint Server 2019 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-2026-62829 to remediate this vulnerability.
CVE-2026-62829: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Microsoft Microsoft SharePoint Server 2019
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-2026-62829) in Microsoft SharePoint Server 2019 (version 16.0.0) is classified as CWE-79, indicating improper neutralization of input during web page generation leading to cross-site scripting (XSS). The flaw allows an attacker with authorized access to inject malicious scripts that can spoof content over a network. The CVSS 3.1 base score is 4.6 (medium), reflecting low complexity and limited impact on confidentiality and integrity, with no impact on availability. Microsoft has released an official fix for this vulnerability.
Potential Impact
An authorized attacker can exploit this XSS vulnerability to perform spoofing attacks over the network, potentially misleading users or executing unauthorized scripts in the context of the victim's browser. The impact is limited to partial confidentiality and integrity loss, with no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users of Microsoft SharePoint Server 2019 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-2026-62829 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-14T21:10:38.082Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62829","vendor":"Microsoft"}]
Threat ID: 6a7b581cbf8831d539156078
Added to database: 08/11/2026, 17:13:00 UTC
Last enriched: 08/11/2026, 21:13:47 UTC
Last updated: 08/12/2026, 02:21:17 UTC
Views: 3
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.