CVE-2026-51741
Unauthenticated log-deletion vuln in TOTOLINK T6 via /cgi-bin/cstecgi.cgi
Is CVE-2026-51741 being exploited?
Not confirmed. CVE-2026-51741 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-2026-51741?
CVE-2026-51741 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-2026-51741?
Yes. A fix has been recorded for CVE-2026-51741. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-51741 affect?
CVE-2026-51741 affects TOTOLINK T6 firmware 4.1.5cu.748_B20211015, /cgi-bin/cstecgi.cgi (clearDiagnosisLog). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-51741?
Update TOTOLINK T6 firmware, restrict admin access and block the CGI endpoint.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attackers can erase router diagnosis logs via a crafted POST, enabling forensic evasion and cover-up of intrusions.
Immediate action required