Description
A security vulnerability has been detected in GL.iNet GL-MT3000 4.4.5. The impacted element is the function rpc_sys of the file /cgi-bin/luci/rpc of the component LuCI JSON-RPC Interface. Such manipulation leads to command injection. The attack may be performed from remote. Upgrading to version 4.8.1 is sufficient to resolve this issue. Upgrading the affected component is advised. The vendor confirms: "The issue discovered by the vulnerability researcher on older firmware versions(4.4.5) has actually been fixed and mitigated in the new version. According to the latest firmware fixes, by default, firmware versions after 4.7.13 do not install LuCI, so this vulnerability cannot be exploited."
Published: 2026-06-07
Score: 5.3 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability is a command injection flaw in LuCI JSON‑RPC’s rpc_sys function, exposing a remote user to the ability to execute arbitrary operating‑system commands on the GL‑iNet GL‑MT3000 router. This can lead to full system compromise, unauthorized data exfiltration or denial of service, and compromise of the device’s confidentiality, integrity and availability. The addressable data in the rpc_sys input is not sanitized, allowing injection of shell commands.

Affected Systems

GL‑iNet GL‑MT3000 routers running firmware 4.4.5 or other earlier releases that include the LuCI web interface. Firmware versions 4.7.13 and newer no longer install LuCI by default, so the vulnerability is not present in those builds. Consequently, only systems with LuCI enabled on older firmware are affected.

Risk and Exploitability

The CVSS score of 5.3 indicates a medium severity. No EPSS data is available and the flaw is not listed in the CISA KEV catalog. The attack can be performed from a remote network with access to the RPC endpoint; it requires no local privileges. Because the flaw is resolved in version 4.8.1 and newer firmware blocks the vulnerable component, the risk to devices that are already updated is low.

Generated by OpenCVE AI on June 7, 2026 at 03:20 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade the router to firmware 4.8.1 or a newer release that removes LuCI, thereby eliminating the rpc_sys vulnerability.
  • If an upgrade is not possible immediately, block or disable access to the LuCI JSON‑RPC endpoint (for example, by firewall rules or disabling the rpc_sys function in configuration).
  • Apply network segmentation or firewall restrictions to limit remote access to the router’s management interfaces, reducing the opportunity for an attacker to reach the vulnerable RPC call.

Generated by OpenCVE AI on June 7, 2026 at 03:20 UTC.

Tracking

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Advisories

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History

Sun, 07 Jun 2026 03:45:00 +0000

Type Values Removed Values Added
First Time appeared Gl-inet gl-mt3000
Vendors & Products Gl-inet gl-mt3000

Sun, 07 Jun 2026 02:45:00 +0000

Type Values Removed Values Added
Description A security vulnerability has been detected in GL.iNet GL-MT3000 4.4.5. The impacted element is the function rpc_sys of the file /cgi-bin/luci/rpc of the component LuCI JSON-RPC Interface. Such manipulation leads to command injection. The attack may be performed from remote. Upgrading to version 4.8.1 is sufficient to resolve this issue. Upgrading the affected component is advised. The vendor confirms: "The issue discovered by the vulnerability researcher on older firmware versions(4.4.5) has actually been fixed and mitigated in the new version. According to the latest firmware fixes, by default, firmware versions after 4.7.13 do not install LuCI, so this vulnerability cannot be exploited."
Title GL.iNet GL-MT3000 LuCI JSON-RPC rpc rpc_sys command injection
First Time appeared Gl-inet
Gl-inet gl-mt3000 Firmware
Weaknesses CWE-74
CWE-77
CPEs cpe:2.3:o:gl-inet:gl-mt3000_firmware:*:*:*:*:*:*:*:*
Vendors & Products Gl-inet
Gl-inet gl-mt3000 Firmware
References
Metrics cvssV2_0

{'score': 6.5, 'vector': 'AV:N/AC:L/Au:S/C:P/I:P/A:P/E:ND/RL:OF/RC:C'}

cvssV3_0

{'score': 6.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C'}

cvssV3_1

{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X'}

Subscriptions

Gl-inet Gl-mt3000 Gl-mt3000 Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-06-07T02:15:08.735Z

Reserved: 2026-06-06T10:33:15.318Z

Link: CVE-2026-11449

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-06-07T03:16:27.077

Modified: 2026-06-07T03:16:27.077

Link: CVE-2026-11449

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-07T03:30:35Z

Weaknesses