CVE-2026-51744
Unauthenticated MQTT flaw in TOTOLINK T6 enabling remote device compromise.
Is CVE-2026-51744 being exploited?
Not confirmed. CVE-2026-51744 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 0.44% probability of exploitation in the next 30 days.
How severe is CVE-2026-51744?
CVE-2026-51744 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-2026-51744?
Yes. A fix has been recorded for CVE-2026-51744. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-51744 affect?
CVE-2026-51744 affects TOTOLINK T6 firmware 4.1.5cu.748_B20211015. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-51744?
Install vendor firmware update and block MQTT access from untrusted networks.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can send crafted MQTT to cs_broker to force mesh sync, enabling remote code execution, device compromise and network pivot.
Immediate action required