CVE-2026-51729
Unauthenticated deletion of managed slave devices via delDevice CGI on TOTOLINK T6
Is CVE-2026-51729 being exploited?
Not confirmed. CVE-2026-51729 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 0.29% probability of exploitation in the next 30 days.
How severe is CVE-2026-51729?
CVE-2026-51729 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-2026-51729?
Not known from our data. No patch reference has been recorded for CVE-2026-51729, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-51729 affect?
CVE-2026-51729 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-2026-51729?
Restrict management interface access, isolate affected devices, apply vendor firmware update when released
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can send a crafted POST to /cgi-bin/cstecgi.cgi to delete managed slave devices, causing device removal and network disruption.
Immediate action required