Vulnerability · Published Apr 30, 2026 · Assigned by VulnCheck
CVE-2025-71284Synway SMG Gateway Management Software OS Command Injection via radius_address
Critical 9.8
In plain English
A critical-severity OS command injection in Synway SMG Gateway Management Software from Synway Information Engineering Co., Ltd.. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 5.7% (higher than 93% of all known vulnerabilities).
Official description
Synway SMG Gateway Management Software contains an OS command injection vulnerability in the RADIUS configuration endpoint at /en/9-2radius.php where the radius_address POST parameter is split and interpolated directly into a sed command without sanitization. An unauthenticated remote attacker can inject arbitrary shell commands by submitting a POST request with crafted radius_address, radius_address2, shared_secret2, source_ip, timeout, or retry parameters along with save=1 and enable_radius=1 to achieve remote code execution. Exploitation evidence was first observed by the Shadowserver Foundation on 2025-07-11 (UTC).
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Synway Information Engineering Co., Ltd. | Synway SMG Gateway Management Software | 0 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/synway/synwaysmg-radius-rce.yaml
- https://mrxn.net/jswz/synway-9-2radius-rce.html technical-description, exploit
- https://mp.weixin.qq.com/s/PyepoFSuQ63E3RnpQa9nsA technical-description, exploit
- https://www.synway.net/ product
- https://www.vulncheck.com/advisories/synway-smg-gateway-management-software-os-command-injection-via-radius-address third-party-advisory