The diagnostics web interface in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware…
Priority LOW 38CWE-22Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
The diagnostics web interface in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0.35) does not validate (escape) the path information (path traversal), which allows an authenticated remote attacker to get access to privileged information (e.g., /etc/passwd) via path traversal (relative path information in the file parameter of the corresponding POST request).
Why it matters now
EPSS 0.01471 73rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-16221
- 2026-10-03 Alias added: GHSA-qpg6-9qg9-qpwr
References
More Yealink Ultra-elegant Ip Phone Sip-t41p Firmware vulnerabilities
- TI-2018-11607 The network diagnostic function (ping) in the Yeahlink Ultra-elegant IP Phone SIP-T41P… CVSS 3.0HIGH 8.8
- TI-2018-11608 A CSRF (Cross Site Request Forgery) in the web interface of the Yeahlink Ultra-elegant IP… CVSS 3.0HIGH 8.8
Sources
- CVE-2018-16221 · CVE Program
- CVE-2018-16221 · NVD
- FIRST EPSS
- GHSA-qpg6-9qg9-qpwr · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences