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

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-04 · updated 2026-10-24
Weakness: CWE-74

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.

Affected products

GL.iNet AX1800: 4.8.0, 4.8.1, 4.8.2, 4.8.3

References

https://github.com/xxianxiayubanmian/iot/blob/main/GL-link%20AX1800.md
https://vuldb.com/cve/CVE-2026-18787
https://vuldb.com/submit/857346
https://vuldb.com/vuln/385788
https://vuldb.com/vuln/385788/cti

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