What is CVE-2025-71284?

CVE-2025-71284 is a critical-severity vulnerability in Synway Smg Gateway Management Software, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-04-30.

How severe is CVE-2025-71284?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Synway Smg Gateway Management Software

CVE-2025-71284

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).

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-04-30 · last modified 2026-09-30.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.057 (92.8th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.057 · newest: 0.057 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/syn… (Third Party Advisory)
mrxn.net/jswz/synway-9-2radius-rce.html (Exploit, technical-description, Third Party Advisory, exploit)
mp.weixin.qq.com/s/PyepoFSuQ63E3RnpQa9nsA (Exploit, technical-description, Third Party Advisory, exploit)
www.synway.net/ (Product, product)
www.vulncheck.com/advisories/synway-smg-gateway-management-software-os-command-… (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2025-71284?: CVE-2025-71284 is a critical-severity vulnerability in Synway Smg Gateway Management Software, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-04-30.
How severe is CVE-2025-71284?: Critical severity. CVSS v3 base score is 9.8 out of 10.