CVE-2026-51726
Unauthenticated POST lets attacker remove parental-control rules on TOTOLINK T6.
Is CVE-2026-51726 being exploited?
Not confirmed. CVE-2026-51726 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.36% probability of exploitation in the next 30 days.
How severe is CVE-2026-51726?
CVE-2026-51726 is rated Critical with a CVSS score of 9.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-51726?
Yes. A fix has been recorded for CVE-2026-51726. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-51726 affect?
CVE-2026-51726 affects TOTOLINK T6 (firmware 4.1.5cu.748_B20211015), TOTOLINK home routers running affected firmware. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-51726?
Update firmware immediately; restrict WAN/admin access; block /cgi-bin/cstecgi.cgi
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can delete parental-control rules via crafted POST to /cgi-bin/cstecgi.cgi, bypassing restrictions and altering router config.
Immediate action required