CVE-2026-36608
UPnP flaw exposes Mercusys AC12G admin UI to Internet.
Is CVE-2026-36608 being exploited?
Not confirmed. CVE-2026-36608 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 0.18% probability of exploitation in the next 30 days.
How severe is CVE-2026-36608?
CVE-2026-36608 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-2026-36608?
Yes. A fix has been recorded for CVE-2026-36608. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-36608 affect?
CVE-2026-36608 affects Mercusys AC12G EU V1 router (AC12G(EU)_V1_200909). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-36608?
Disable UPnP; restrict WAN admin access; patch when released
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated LAN attacker can map ports via UPnP to 192.168.1.1/127.0.0.1, exposing router admin to Internet.
Immediate action required