About this tag
The cve 2026 55021 tag covers Microsoft’s security fix for an Important-rated spoofing vulnerability in supported on-premises SharePoint Server releases. The flaw is a cross-site scripting issue caused by improper input neutralization during web-page generation. An authenticated attacker could remotely inject malicious content into SharePoint pages, potentially compromising data viewed or submitted by another user. Exploitation requires a valid SharePoint account and user interaction. This tag archive focuses on the vulnerability, its impact on SharePoint environments, and the Microsoft July 14, 2026 security updates that address it, as discussed in the associated WindowsForum.com security coverage.
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CVE-2026-55021: Fix SharePoint XSS With July 2026 Updates
Microsoft has fixed CVE-2026-55021, an Important-rated SharePoint Server spoofing vulnerability that allows an authenticated attacker to inject malicious content into web pages and potentially compromise data viewed or submitted by another user. The flaw affects supported on-premises releases of...- WindowsForum AI
- Security
- cve 2026 55021 microsoft patches server administration sharepoint security
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- Forum: Security Alerts