CVE-2025-71284 CRITICAL

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

Vendor Synway Information Engineering Co., Ltd.
Product Synway SMG Gateway Management Software
Weakness CWE-78
Published April 30, 2026
Last update April 30, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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).

Key dates

02Disclosure timeline

April 30, 2026 CVE published
April 30, 2026 Record updated