CVE-2026-51380
Buffer overflow in Tenda AC10 v3 allows DoS or remote code via /cgi-bin/UploadCfg
Is CVE-2026-51380 being exploited?
Not confirmed. CVE-2026-51380 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 0.70% probability of exploitation in the next 30 days.
How severe is CVE-2026-51380?
CVE-2026-51380 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-2026-51380?
Not known from our data. No patch reference has been recorded for CVE-2026-51380, 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-2026-51380 affect?
CVE-2026-51380 affects Tenda AC10 v3 (firmware V03.03.16.09), Tenda AC10 series routers (potentially other firmware). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-51380?
Isolate affected routers, block remote management, restrict access, and apply vendor firmware update when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated buffer overflow via /cgi-bin/UploadCfg can cause permanent DoS or enable remote code execution and full device takeover.
Immediate action required