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GL-iNet GL-MT3000 EUVDEUVD-2026-52395

| CVE-2026-18612 HIGH
Command Injection (CWE-77)
2026-08-03 VulDB GHSA-jjmc-7j8f-v4hf
Command Injection Gl Mt3000
8.9
CVSS 4.0 · Vendor: VulDB
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Severity by source

Vendor (VulDB) PRIMARY
8.9 CRITICAL
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
vuln.today AI
9.8 CRITICAL

Network-reachable CGI requires no authentication (PR:N, AV:N); command injection yields full C/I/A impact; scope unchanged as only the router is compromised.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: 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/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

6
Analysis Updated
Aug 03, 2026 - 18:30 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Aug 03, 2026 - 18:22 vuln.today
cvss_changed
Severity Changed
Aug 03, 2026 - 18:22 NVD
CRITICAL HIGH
CVSS changed
Aug 03, 2026 - 18:22 NVD
9.3 (CRITICAL) 8.9 (HIGH)
Analysis Generated
Aug 03, 2026 - 18:15 vuln.today
CVE Published
Aug 03, 2026 - 17:30 cve.org
CRITICAL 9.3

DescriptionCVE.org

A flaw has been found in GL-iNet GL-MT3000 up to 4.4.5. This vulnerability affects the function plugins.remove_package/plugins.install_package of the file /cgi-bin/glc of the component plugins.so Native Plugin. This manipulation causes command injection. The attack can be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure and confirmed the existence of the vulnerability.

AnalysisAI

Remote command injection in GL-iNet GL-MT3000 firmware through version 4.4.5 allows unauthenticated network attackers to execute arbitrary OS commands via crafted package name input to the plugins.install_package or plugins.remove_package functions exposed through the /cgi-bin/glc CGI endpoint. The CVSS 4.0 vector confirms no authentication, no complexity barriers, and full confidentiality, integrity, and availability impact on the vulnerable system. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify internet-exposed GL-MT3000 management interface
Delivery
Send crafted HTTP request to /cgi-bin/glc
Exploit
Inject OS commands via package name parameter
Execution
Trigger plugins.install_package or plugins.remove_package execution
Persist
Execute arbitrary commands as router CGI process
Impact
Establish persistent access or pivot to connected network
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Vulnerability AssessmentAI

Exploitation No special conditions are required beyond network reachability of the management interface - the CVSS 4.0 vector AV:N/AC:L/AT:N/PR:N/UI:N confirms remote unauthenticated exploitation with no complexity barriers against GL-MT3000 devices running firmware 4.4.5 or earlier where the /cgi-bin/glc endpoint is accessible. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 8.9 with base metrics AV:N/AC:L/AT:N/PR:N/UI:N reflects the most dangerous exploitation profile: remotely reachable, trivially exploitable, requiring no credentials or user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An unauthenticated attacker sends a crafted HTTP request to the /cgi-bin/glc endpoint on a GL-MT3000 with its management interface exposed to the internet, injecting shell metacharacters (e.g., semicolons or backticks) into the package name parameter consumed by plugins.install_package or plugins.remove_package. The injected payload executes as an OS command under the privileges of the router's CGI process, granting full device control - enabling persistent backdoor installation, traffic interception, or lateral movement into connected networks. …
Remediation No vendor-released patched firmware version is identified in the available data - a fix version was not specified in any reference. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all GL-MT3000 devices and identify those with internet-exposed management interfaces (/cgi-bin/glc endpoint); document current firmware versions. …

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EUVD-2026-52395 vulnerability details – vuln.today
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