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GL-iNet GL-MT3000 CVE-2026-18615

| EUVDEUVD-2026-52401 HIGH
Command Injection (CWE-77)
2026-08-03 VulDB GHSA-hh6h-4vwh-4vhf
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 endpoint with PR:N per 4.0 vector; command injection yields full OS control, so C/I/A all High; no scope change indicated.

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 - 19:31 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Aug 03, 2026 - 19:22 vuln.today
cvss_changed
Severity Changed
Aug 03, 2026 - 19:22 NVD
CRITICAL HIGH
CVSS changed
Aug 03, 2026 - 19:22 NVD
9.3 (CRITICAL) 8.9 (HIGH)
Analysis Generated
Aug 03, 2026 - 19:00 vuln.today
CVE Published
Aug 03, 2026 - 18:15 cve.org
CRITICAL 9.3

DescriptionCVE.org

A vulnerability was determined in GL-iNet GL-MT3000 up to 4.4.5. The affected element is the function wg-server.generate_publickey of the file /cgi-bin/glc of the component wg-server.so Native Plugin. Executing a manipulation of the argument private_key can lead to command injection. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure and confirmed the existence of the vulnerability.

AnalysisAI

Remote command injection in the GL-iNet GL-MT3000 travel router (firmware 4.4.0-4.4.5) allows unauthenticated network-adjacent or internet-exposed attackers to execute arbitrary OS commands by supplying a maliciously crafted private_key argument to the WireGuard server public key generation endpoint at /cgi-bin/glc. The vendor has confirmed the vulnerability, and a public proof-of-concept exploit is available on GitHub, significantly lowering the barrier to exploitation. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify network-exposed GL-MT3000 management interface
Delivery
Send crafted HTTP request to /cgi-bin/glc
Exploit
Supply malicious private_key with shell metacharacters
Execution
wg-server.so passes unsanitized input to OS shell
Persist
Injected command executes as root
Impact
Full device compromise achieved
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Vulnerability AssessmentAI

Exploitation The `/cgi-bin/glc` endpoint hosting the `wg-server.generate_publickey` function must be reachable from the attacker's network position. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) represents the most severe possible attack profile: unauthenticated, remotely exploitable, no special attack requirements, and no user interaction needed. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with network access to the GL-MT3000's management interface sends a crafted HTTP POST request to `/cgi-bin/glc` targeting the WireGuard server key generation function, embedding shell metacharacters such as a semicolon or backtick within the `private_key` parameter value. The `wg-server.generate_publickey` function passes the unsanitized argument to an OS shell command, causing the injected payload - for example a reverse shell or credential extraction command - to execute with the privileges of the web server process, which on embedded GL-iNet devices is typically root. …
Remediation No vendor-released patched firmware version has been identified in the available data - patch availability is unconfirmed at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify all GL-MT3000 routers in active use through network scanning and device inventory, flagging internet-exposed and corporate VPN-connected instances for priority action. …

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CVE-2026-18615 vulnerability details – vuln.today
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