Authenticated spoofing via undisclosed cross-site scripting
Published Sep 8, 2026 · Updated Sep 9, 2026
Cross-site scripting in Microsoft SharePoint Server Subscription Edition before 16.0.20326.20090 allows remote authenticated users to spoof content. Microsoft has not disclosed the affected page-generation locus or the input that reaches browser output without proper neutralization. Exploitation requires low-privilege authentication and victim interaction, and successful script execution can read or modify data available to the victim's SharePoint session.
Summary
What happened
Cross-site scripting in Microsoft SharePoint Server Subscription Edition before 16.0.20326.20090 allows remote authenticated users to spoof content. Microsoft has not disclosed the affected page-generation locus or the input that reaches browser output without proper neutralization. Exploitation requires low-privilege authentication and victim interaction, and successful script execution can read or modify data available to the victim's SharePoint session.
The record
- CVE
- CVE-2026-69402
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Server Subscription Edition
- Classifications
- CWE-79
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=16.0.0 <16.0.20326.20090
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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