CVE-2026-18685

CRITICAL 9.8

GL.iNet GL-MT3000 modem.so glc set_upgrade command injection

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-77 CWE-74
Vendor	gl.inet
Product	gl-mt3000
Published	Aug 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

GL.iNet / GL-MT3000

4.4.0 4.4.1 4.4.2 4.4.3 4.4.4 4.4.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 Strforexc2 (VulDB User) VulDB CNA Team