CVE-2026-9458
Remote OS command injection in Totolink A8000RU web UI.
Is CVE-2026-9458 being exploited?
Not confirmed. CVE-2026-9458 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 2.1% probability of exploitation in the next 30 days.
How severe is CVE-2026-9458?
CVE-2026-9458 is rated High with a CVSS score of 8.9. 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-2026-9458?
Not known from our data. No patch reference has been recorded for CVE-2026-9458, 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-2026-9458 affect?
CVE-2026-9458 affects Totolink A8000RU 7.1cu.643_b20200521, Web Management Interface: /cgi-bin/cstecgi.cgi. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-9458?
Update firmware if patch exists; otherwise disable WAN web management.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote command execution on the router via crafted setWanCfg parameter; full device compromise.
Immediate action required
- affected7.1cu.643_b20200521
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.