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CVE-2026-18787— GL.iNet AX1800 RPC Endpoint oui-rpc.lua remove_rule command injection

Quick assessment

Affected
GL.iNet AX1800
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GL-iNet ax1800 firmware是中国GL-iNet公司开源的一款路由器操作系统。 GL-iNet ax1800 firmware 4.8.3及之前版本存在安全漏洞，该漏洞源于RPC Endpoint组件中/usr/share/gl-ngx/oui-rpc.lua文件的remove_rule函数对参数args.id的操作，可能导致命令注入。

CVSS 8.8 · High EPSS 3.21% · P88

Affected Version Matrix 4

VendorProduct Version RangeStatus
GL.iNet AX1800 4.8.0 affected
4.8.1 affected
4.8.2 affected
4.8.3 affected
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I. Basic Information for CVE-2026-18787

Vulnerability Information
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Vulnerability Title
GL.iNet AX1800 RPC Endpoint oui-rpc.lua remove_rule command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified in GL.iNet AX1800 up to 4.8.3. The affected element is the function remove_rule of the file /usr/share/gl-ngx/oui-rpc.lua of the component RPC Endpoint. The manipulation of the argument args.id leads to command injection. The attack is possible to be carried out remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
GL-iNet ax1800 firmware 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GL-iNet ax1800 firmware是中国GL-iNet公司开源的一款路由器操作系统。 GL-iNet ax1800 firmware 4.8.3及之前版本存在安全漏洞，该漏洞源于RPC Endpoint组件中/usr/share/gl-ngx/oui-rpc.lua文件的remove_rule函数对参数args.id的操作，可能导致命令注入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GL.iNet AX1800 4.8.0 cpe:2.3:o:gl-inet:ax1800_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-18787

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 10331 chars
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III. Intelligence Information for CVE-2026-18787

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News Coverage for CVE-2026-18787 (1)

IV. Related Vulnerabilities

Same product: AX1800
Same vendor: GL.iNet
Same weakness: CWE-77

V. Comments for CVE-2026-18787

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