CVE-2026-18685

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.

CVSS 4.0

8.9CVSS: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

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

3.6% chance of exploitation in the next 30 days; higher than 89% of CVEs (scores of 2026-10-25)

CWEs

CWE-74, CWE-77

Published

2026-08-04

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

References

• 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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