CVE-2019-14657
They execute tar as root to extract files, but do not validate the extraction directory.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.74% probability · 90th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-22, CWE-434
- Affected
- yeahlink/vp59 firmware · yeahlink/t49g firmware · yeahlink/t58v firmware
- Source
- cve@mitre.org
EPSS 3.7% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.