CVE-2026-18612
Remote command injection in GL-iNet GL-MT3000 CGI plugins enabling device takeover
Is CVE-2026-18612 being exploited?
Not confirmed. CVE-2026-18612 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-2026-18612?
CVE-2026-18612 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-2026-18612?
Not known from our data. No patch reference has been recorded for CVE-2026-18612, 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-2026-18612 affect?
CVE-2026-18612 affects GL‑iNet GL-MT3000 firmware <= 4.4.5, /cgi-bin/glc (plugins.so) - plugins.remove_package/plugins.install_package. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-18612?
Isolate devices, disable remote management, block /cgi-bin/glc access; apply vendor firmware when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote command execution via /cgi-bin/glc plugins (install/remove), enabling arbitrary commands, full device compromise and network pivot.
Immediate action required
- affected4.4.0
- affected4.4.1
- affected4.4.2
- affected4.4.3
- affected4.4.4
- affected4.4.5
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.