Vulnerability record · CVE-2026-18685 · published 4 August 2026

CVE-2026-18685: Injection vulnerability

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.

8.9 CVSS 4.0 High EPSS 3.6% · top 10.9% CWE-74 · InjectionCWE-77 · Command injection Deferred

8.9CVSS 4.0 base score, v2 10.0

3.6%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

5References

12 Aug 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://github.com/StrTzz123/iot_vul/tree/main/GL-iNet/MT3000/4.4.5/modem_set_upgrade_glc_rce
https://vuldb.com/cve/CVE-2026-18685
https://vuldb.com/submit/851593
https://vuldb.com/vuln/385611
https://vuldb.com/vuln/385611/cti

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Source: NIST National Vulnerability Database (record CVE-2026-18685), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.