CVE-2026-31178
RCE in ToToLink A3300R firmware via stunMaxAlive CGI param.
Is CVE-2026-31178 being exploited?
Not confirmed. CVE-2026-31178 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 0.58% probability of exploitation in the next 30 days.
How severe is CVE-2026-31178?
CVE-2026-31178 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-2026-31178?
Not known from our data. No patch reference has been recorded for CVE-2026-31178, 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-2026-31178 affect?
CVE-2026-31178 affects ToToLink A3300R firmware v17.0.0cu.557_B20221024. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-31178?
Patch when available; monitor exposure; isolate device until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution on the router via stunMaxAlive CGI parameter, enabling attacker control of device.
Patch when possible