CVE-2026-12223 Yealink SIP-T46U Web FastCGI Service tftpuploadiperf mod_webd.TFTPUploadIperf command injection
A command injection vulnerability in the Yealink SIP-T46U web service allows local network attackers to execute arbitrary commands via the TFTP upload interface.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12223?
CVE-2026-12223 is a medium-severity command injection vulnerability in Yealink SIP-T46U, published on 15 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was identified in Yealink SIP-T46U 108.86.0.118. Affected by this vulnerability is the function mod_webd.TFTPUploadIperf of the file /api/inner/tftpuploadiperf of the component Web FastCGI Service. The manipulation of the argument ip/port leads to command injection. The attack needs to be initiated within the local network. The exploit is publicly available and might be used. Upgrading to version 108.87.0.23 addresses this issue. Upgrading the affected component is recommended. The vendor explains: "It has been fixed (...) for our technical support branch. However, please note that this specific support branch firmware is not publicly released yet."
Which versions are affected by CVE-2026-12223?
How do I fix CVE-2026-12223?
No fix has been published for CVE-2026-12223 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-12223 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12223 exists.
Sources
Also known as GHSA-pcph-rxv7-4pvp.