CVE-2026-51718
Unauthenticated deletion of static DHCP entries on TOTOLINK T6 routers
Is CVE-2026-51718 being exploited?
Not confirmed. CVE-2026-51718 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 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-51718?
CVE-2026-51718 is rated Critical with a CVSS score of 9.8. 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-2026-51718?
Yes. A fix has been recorded for CVE-2026-51718. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-51718 affect?
CVE-2026-51718 affects TOTOLINK T6 (firmware 4.1.5cu.748_B20211015), TOTOLINK devices exposing /cgi-bin/cstecgi.cgi. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-51718?
Install vendor firmware fix; isolate/replace affected routers and restrict management access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated HTTP POST can remove static DHCP reservations, enabling IP hijack, DHCP conflicts, or network DoS.
Immediate action required