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GL-iNet GL-MT3000 EUVDEUVD-2026-52414

| CVE-2026-18616 HIGH
Command Injection (CWE-77)
2026-08-03 VulDB GHSA-39jx-5rpr-2f33
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, no authentication per provided CVSS 4.0 PR:N, command injection yields full device control with no scope change to other systems.

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 - 19:28 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 - 19:15 vuln.today
CVE Published
Aug 03, 2026 - 18:30 cve.org
CRITICAL 9.3

DescriptionCVE.org

A vulnerability was identified in GL-iNet GL-MT3000 up to 4.4.5. The impacted element is the function server.set_peer of the file /cgi-bin/glc of the component wg-server.so Native Plugin. The manipulation of the argument public_key leads to command injection. Remote exploitation of the attack is possible. The exploit is publicly available and might 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 (up to version 4.4.5) allows unauthenticated network attackers to execute arbitrary OS commands on the device by supplying a malicious public_key argument to the server.set_peer function exposed via the /cgi-bin/glc CGI endpoint of the WireGuard server native plugin (wg-server.so). The vendor has confirmed the vulnerability following coordinated disclosure, and a public proof-of-concept exploit is available on GitHub, materially lowering the barrier to exploitation. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify GL-MT3000 with WireGuard server enabled
Delivery
Send crafted HTTP request to /cgi-bin/glc
Exploit
Inject shell commands via public_key argument
Execution
server.set_peer passes unsanitized input to OS
Persist
Execute arbitrary commands as root
Impact
Full device compromise
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Vulnerability AssessmentAI

Exploitation The WireGuard server plugin (wg-server.so) must be active on the device, meaning the WireGuard server mode feature must be enabled in the GL-iNet firmware configuration - this is not guaranteed to be the default state and should be verified per deployment. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 8.9 reflects a network-accessible (AV:N), low-complexity (AC:L), unauthenticated (PR:N), no-user-interaction (UI:N) attack path with high confidentiality, integrity, and availability impact on the vulnerable system and no downstream scope change. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An unauthenticated remote attacker sends a crafted HTTP POST request to the /cgi-bin/glc endpoint targeting the server.set_peer function, embedding shell metacharacters (e.g., a semicolon or command substitution sequence) in the public_key parameter value. The unsanitized input is passed to an underlying system call within wg-server.so, causing the injected command to execute with the privileges of the CGI process - typically root on embedded GL-iNet firmware. …
Remediation No vendor-released patched firmware version is identified in the available data at time of analysis; the patch status should be tracked via the GL-iNet official firmware release page and VulDB advisory at https://vuldb.com/vuln/385536. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, conduct an inventory of all GL-MT3000 devices across your network and immediately disable the WireGuard server plugin (wg-server.so) through device administration interfaces or restrict network access to these devices via firewall access control lists. …

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EUVD-2026-52414 vulnerability details – vuln.today
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