Vulnerability details
CVE-2026-18685
GL.iNet GL-MT3000
GL.iNet GL-MT3000 modem.so glc set_upgrade command injection
CVSS 4.0
9.3Critical
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.3Critical | 4.0 | CVEProject cvelistV5 (CNA) (VulDB) | 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 |
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (VulDB) | 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 |
| 9.8Critical | 3.0 | CVEProject cvelistV5 (CNA) (VulDB) | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R |
| 10.0High | 2.0 | CVEProject cvelistV5 (CNA) (VulDB) | AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:C |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| GL.iNet | GL-MT3000 | 4.4.0 | CVEProject cvelistV5 (CNA) |
| GL.iNet | GL-MT3000 | 4.4.1 | CVEProject cvelistV5 (CNA) |
| GL.iNet | GL-MT3000 | 4.4.2 | CVEProject cvelistV5 (CNA) |
| GL.iNet | GL-MT3000 | 4.4.3 | CVEProject cvelistV5 (CNA) |
| GL.iNet | GL-MT3000 | 4.4.4 | CVEProject cvelistV5 (CNA) |
| GL.iNet | GL-MT3000 | 4.4.5 | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://vuldb.com/vuln/385611 vdb-entrytechnical-description
- https://vuldb.com/vuln/385611/cti signaturepermissions-required
- https://vuldb.com/cve/CVE-2026-18685 third-party-advisory
- https://vuldb.com/submit/851593 third-party-advisory
- https://github.com/StrTzz123/iot_vul/tree/main/GL-iNet/MT3000/4.4.5/modem_set_upgrade_glc_rce exploitpatch
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Details
- Published
- 2026-08-04
- Last updated
- 2026-08-04
- State
- Published
- Assigner (CNA)
- VulDB
Exploit prediction (EPSS)
3.61%
Probability of exploitation in 30 days
89.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-77Command Injection
- CWE-74Injection