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GL-MT3000 CVE-2026-18600

| EUVDEUVD-2026-52267 HIGH
Command Injection (CWE-77)
2026-08-03 VulDB GHSA-m56q-x47w-q72w
Command Injection Gl Mt3000
7.4
CVSS 4.0 · Vendor: VulDB
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Severity by source

Vendor (VulDB) PRIMARY
7.4 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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
8.8 HIGH

Network-accessible RPC endpoint requires low-privilege authentication (PR:L); no special conditions; full impact on device with no scope change to subsequent systems.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:L/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:L/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
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Aug 03, 2026 - 14:31 vuln.today
CVSS changed
Aug 03, 2026 - 14:22 NVD
8.7 (HIGH) 7.4 (HIGH)
CVE Published
Aug 03, 2026 - 13:00 cve.org
HIGH 7.4

DescriptionCVE.org

A vulnerability has been found in GL.iNet GL-MT3000 up to 4.4.5. This affects the function network.switch_info/network.switch_status of the file /usr/lib/oui-httpd/rpc/network of the component Network Lua RPC Plugin. Such manipulation of the argument switch leads to command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure and confirmed the existence of the vulnerability.

AnalysisAI

Command injection in the GL.iNet GL-MT3000 router's Network Lua RPC Plugin allows authenticated remote attackers to execute arbitrary OS commands by injecting shell metacharacters into the switch argument of the network.switch_info or network.switch_status RPC methods. Firmware versions 4.4.0 through 4.4.5 are confirmed affected, with the vendor acknowledging the vulnerability following coordinated disclosure. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain low-privilege management credentials
Delivery
Send crafted HTTP RPC request to oui-httpd network plugin endpoint
Exploit
Inject shell metacharacters into switch argument
Execution
Bypass unsanitized command construction in Lua script
Impact
Execute arbitrary OS commands on router as oui-httpd process
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Vulnerability AssessmentAI

Exploitation Exploitation requires valid credentials providing at least low-privilege access to the GL-MT3000 web management interface (PR:L per CVSS 4.0 vector) - unauthenticated exploitation is not supported by the available data. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 7.4 with base vector AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H reflects a high-impact vulnerability requiring no special attack conditions and no user interaction, constrained only by the low-privilege authentication requirement (PR:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who possesses low-privilege credentials to the GL-MT3000 web management interface - obtained via credential stuffing, default credentials, or network interception - sends a crafted HTTP RPC request to the `network.switch_info` or `network.switch_status` endpoint with shell metacharacters injected into the `switch` parameter. The `oui-httpd` daemon passes the unsanitized argument directly to an OS command, resulting in arbitrary command execution on the router. …
Remediation No vendor-released patched firmware version has been identified in the available data at time of analysis - patch availability is unconfirmed and users should monitor GL.iNet's official firmware release page for GL-MT3000 updates beyond version 4.4.5. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, conduct a complete inventory of GL-MT3000 routers running firmware 4.4.0 through 4.4.5; immediately isolate identified devices to segregated network segments and implement firewall rules blocking RPC method access. …

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CVE-2026-18600 vulnerability details – vuln.today
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