Answer in brief
CVE-2026-55021 records a High severity (CVSS 7.3) xss vulnerability in CVE-2026-55021. The source record does not mark it as known exploited. No package mapping is present, so exposure must be confirmed against the affected product and deployment inventory.
Review the upstream advisory, identify the affected product in your inventory, and apply the vendor update when one is available.
XSS describes the vulnerability class recorded for this advisory. The current record does not mark CVE-2026-55021 as known exploited; continue to monitor the source for status changes. This is a product-level record in the current feed, not a package-level dependency mapping.
Affected software not mapped. Review the upstream record for vendor-specific product and version guidance.
Answer in brief
CVE-2026-55021 records a High severity (CVSS 7.3) xss vulnerability in CVE-2026-55021. The source record does not mark it as known exploited. No package mapping is present, so exposure must be confirmed against the affected product and deployment inventory.
Review the upstream advisory, identify the affected product in your inventory, and apply the vendor update when one is available.
XSS describes the vulnerability class recorded for this advisory. The current record does not mark CVE-2026-55021 as known exploited; continue to monitor the source for status changes. This is a product-level record in the current feed, not a package-level dependency mapping.
Affected software not mapped. Review the upstream record for vendor-specific product and version guidance.
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.
Reported by NVD (nvd).
CVE-2026-55021 records a High severity (CVSS 7.3) xss vulnerability in CVE-2026-55021. The source record does not mark it as known exploited. No package mapping is present, so exposure must be confirmed against the affected product and deployment inventory.
The source record does not mark it as known exploited.
Confirm whether the product or interface named by this advisory exists in your inventory.
HOL Guard can help your team monitor supply-chain activity while the upstream record is clarified.
Explore HOL GuardImproper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
Reported by NVD (nvd).
CVE-2026-55021 records a High severity (CVSS 7.3) xss vulnerability in CVE-2026-55021. The source record does not mark it as known exploited. No package mapping is present, so exposure must be confirmed against the affected product and deployment inventory.
The source record does not mark it as known exploited.
Confirm whether the product or interface named by this advisory exists in your inventory.
HOL Guard can help your team monitor supply-chain activity while the upstream record is clarified.
Explore HOL Guard