CVE-2026-19348 Shenzhen Aitemi M300 Wi-Fi Repeater protocol.csp sprintf command injection
Remote attackers can execute arbitrary commands on Shenzhen Aitemi M300 Wi-Fi Repeaters via unsanitized input in the MAC filter configuration interface.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19348?
CVE-2026-19348 is a critical command injection vulnerability in Shenzhen Aitemi M300 Wi-Fi Repeater, published on 9 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security flaw has been discovered in Shenzhen Aitemi M300 Wi-Fi Repeater r0-ea7890a. Impacted is the function sprintf of the file /protocol.csp?fname=net&opt=smacfilter_conf&function=set&act=add&name=test&enable=1. Performing a manipulation of the argument enable/name/mac results in command injection. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks.
Which versions are affected by CVE-2026-19348?
How do I fix CVE-2026-19348?
No fix has been published for CVE-2026-19348 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-2026-19348 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19348 exists.
Sources
Also known as GHSA-5x4f-6m9q-mg75.