AP firmware vulnerability could disrupt network operations; widely deployed on enterprise WLAN gear; high impact.
CVE-2026-20430
WLAN AP firmware OOB write enables remote privilege escalation.
Is CVE-2026-20430 being exploited?
Not confirmed. CVE-2026-20430 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 0.22% probability of exploitation in the next 30 days.
How severe is CVE-2026-20430?
CVE-2026-20430 is rated High with a CVSS score of 8.8. 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-2026-20430?
Yes. A fix has been recorded for CVE-2026-20430. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-20430 affect?
CVE-2026-20430 affects WLAN AP firmware. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-20430?
Patch ASAP to all affected APs
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote privilege escalation via out-of-bounds write; no user interaction; proximity required.
Patch when possible
- affectedMT6890
- affectedMT7915
- affectedMT7916
- affectedMT7981
- affectedMT7986
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.