CVE-2026-51661 in TOTOLINK

Summary

by MITRE • 08/29/2026

Incorrect access control in the getPortForwardRules function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain port-forwarding rules via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

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• Responsible: MITRE
• Reservation: 06/08/2026
• Disclosure: 08/29/2026
• Moderation: accepted
• Entry: VDB-396943
• CPE: ready
• CWE: CWE-284 (confirmed)
• CVSS: 5.3 (VulDB)
• EPSS: 0.00000
• KEV: no
• Activities: very low

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-51661
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-51661
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-51661/