The CVE identifier CVE-2026-21651 was reserved by Fortinet but subsequently rejected, indicating that the vulnerability either does not exist, was a duplicate, or was otherwise invalidated. No technical details, affected product versions, or exploit information have been provided. The lack of a CVSS score and absence of patch or mitigation details further support that this is not an actionable vulnerability. The rejection status means that security teams should not consider this CVE as a valid threat or vulnerability requiring remediation. It is common for CVE entries to be reserved and later rejected when further analysis invalidates the initial claim or when the issue is resolved before public disclosure.

Since CVE-2026-21651 is rejected and lacks any technical or exploit information, it poses no known impact to any organizations, including those in Europe. There is no evidence of confidentiality, integrity, or availability compromise associated with this entry. European organizations do not need to allocate resources to address this CVE, as it does not represent a real or exploitable vulnerability.

No specific mitigation actions are required for CVE-2026-21651 due to its rejected status and lack of technical details. Organizations should continue to follow standard security best practices, including timely patching of confirmed vulnerabilities and monitoring vendor advisories. Security teams should verify the status of CVEs through authoritative sources to avoid unnecessary remediation efforts on invalid or rejected entries.