CVE-2019-14657

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

Yealink phones through 2019-08-04 have an issue with OpenVPN file upload. They execute tar as root to extract files, but do not validate the extraction directory. Creating a tar file with ../../../../ allows replacement of almost any file on a phone. This leads to password replacement and arbitrary code execution as root.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-22 CWE-434

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://cerebusforensics.com/yealink/exploit.htmlExploit, Third Party Advisory
https://sway.office.com/3pCb559LYVuT0eigExploit, Third Party Advisory
http://cerebusforensics.com/yealink/exploit.htmlExploit, Third Party Advisory
https://sway.office.com/3pCb559LYVuT0eigExploit, Third Party Advisory

Timeline

Published: Oct 8, 2019
Last modified: Jun 17, 2026
NVD status: Modified

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