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CVE-2025-71284: Synway SMG Gateway Management Software OS Command Injection via radius_address

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-30 · updated 2026-10-07
• Weakness: CWE-78

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

• Synway Information Engineering Co., Ltd. Synway SMG Gateway Management Software: all versions

References

• https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/synway/synwaysmg-radius-rce.yaml
• https://mp.weixin.qq.com/s/PyepoFSuQ63E3RnpQa9nsA
• https://mrxn.net/jswz/synway-9-2radius-rce.html
• https://www.synway.net/
• https://www.vulncheck.com/advisories/synway-smg-gateway-management-software-os-command-injection-via-radius-address

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