CVE-2025-71284

critical

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).

References

Exploits
More

https://mrxn.net/jswz/synway-9-2radius-rce.html

https://mp.weixin.qq.com/s/PyepoFSuQ63E3RnpQa9nsA

https://www.vulncheck.com/advisories/synway-smg-gateway-management-software-os-command-injection-via-radius-address

https://www.synway.net/

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/synway/synwaysmg-radius-rce.yaml

Details

Source: Mitre, NVD

Published: 2026-04-30

Updated: 2026-04-30

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

CVSS v4

Base Score: 9.3

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

Severity: Critical