github.comexploitpatch
https://github.com/StrTzz123/iot_vul/tree/main/GL-iNet/MT3000/4.4.5/modem_set_upgrade_glc_rce CVE-2026-18685
CRITICAL
GL.iNet GL-MT3000 modem.so glc set_upgrade command injection
Record summary
CVE-2026-18685 has a selected CVSS score of 9.3 (critical).
Description
A security vulnerability has been detected in GL.iNet GL-MT3000 up to 4.4.5. Impacted is the function set_upgrade of the file /cgi-bin/glc of the component modem.so. Such manipulation leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure and confirmed the existence of the vulnerability.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationPoC
AutomatableYes
Technical impactTotal
CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 4, 2026 · Source: CVE List
Affected products and versions
1| Product | Source | Version range | Status |
|---|---|---|---|
GL-MT3000Browse GL.iNet / GL-MT3000 | CVE List | 4.4.0 | affected |
| 4.4.1 | affected | ||
| 4.4.2 | affected | ||
| 4.4.3 | affected | ||
| 4.4.4 | affected | ||
| 4.4.5 | affected |
References
6nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2026-18685 CVE-2026-18685 | CVE Analysis and ReportThird-party advisory
https://vuldb.com/cve/CVE-2026-18685 Submit #851593 | GL.iNet MT3000 4.4.5 Command InjectionThird-party advisory
https://vuldb.com/submit/851593 VDB-385611 | GL.iNet GL-MT3000 modem.so glc set_upgrade command injectionvdb entryTechnical description
https://vuldb.com/vuln/385611 VDB-385611 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions required
https://vuldb.com/vuln/385611/cti