Authenticated content spoofing via undisclosed cross-site scripting
Published Jul 14, 2026 · Updated Jul 14, 2026
Cross-site scripting in affected Microsoft SharePoint Server builds allows remote authenticated users to spoof content over a network. Microsoft has not disclosed the vulnerable component or how attacker-controlled input reaches an HTML response without adequate neutralization. Exploitation requires SharePoint authorization and user interaction; the reported consequence is rendered-content spoofing with limited data exposure or alteration.
Summary
What happened
Cross-site scripting in affected Microsoft SharePoint Server builds allows remote authenticated users to spoof content over a network. Microsoft has not disclosed the vulnerable component or how attacker-controlled input reaches an HTML response without adequate neutralization. Exploitation requires SharePoint authorization and user interaction; the reported consequence is rendered-content spoofing with limited data exposure or alteration.
The record
- CVE
- CVE-2026-55030
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Enterprise Server 2016
- Classifications
- CWE-79
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 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 <16.0.5561.1001
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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