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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-18685
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-04 00:16:40 UTC
Updated2026-08-12 20:59:00 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 8.9 HIGH from [email protected]

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:X/V:X/RE:X/U:X

EPSS: 0.019890000 probability, percentile 0.788650000 (date 2026-08-14)

Problem Types: CWE-74 | CWE-77 | CWE-77 Command Injection | CWE-74 Injection

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary8.9HIGHCVSS: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/C...
4.0CNADECLARED9.3CRITICALCVSS: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
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
3.0CNADECLARED9.8CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
2.0[email protected]Secondary10AV:N/AC:L/Au:N/C:C/I:C/A:C
2.0CNADECLARED10AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:C

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA GL.iNet GL-MT3000 affected 4.4.0 Not specified
CNA GL.iNet GL-MT3000 affected 4.4.1 Not specified
CNA GL.iNet GL-MT3000 affected 4.4.2 Not specified
CNA GL.iNet GL-MT3000 affected 4.4.3 Not specified
CNA GL.iNet GL-MT3000 affected 4.4.4 Not specified
CNA GL.iNet GL-MT3000 affected 4.4.5 Not specified

References

ReferenceSourceLinkTags
vuldb.com/vuln/385611 [email protected] vuldb.com
vuldb.com/submit/851593 [email protected] vuldb.com
github.com/StrTzz123/iot_vul/tree/main/GL-iNet/MT3000/4.4.5/modem_set_up... [email protected] github.com
vuldb.com/vuln/385611/cti [email protected] vuldb.com
vuldb.com/cve/CVE-2026-18685 [email protected] vuldb.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Strforexc2 (VulDB User) (en)

CNA: VulDB CNA Team (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-03T00:00:00.000ZAdvisory disclosed
CNA2026-08-03T02:00:00.000ZVulDB entry created
CNA2026-08-03T17:55:20.000ZVulDB entry last update

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