CVE-2023-34356 Command injection in Surf SOHO HW1

High 7.2 Published 11 Oct 2023 Updated 4 Nov 2025

An authenticated attacker can execute arbitrary OS commands via a crafted HTTP request to the data.cgi xfer_dns functionality.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-34356?

CVE-2023-34356 is a high-severity command injection vulnerability in Peplink Surf SOHO HW1, published on 11 Oct 2023. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

An OS command injection vulnerability exists in the data.cgi xfer_dns functionality of peplink Surf SOHO HW1 v6.3.5 (in QEMU). A specially crafted HTTP request can lead to command execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Weakness: CWE-78

Which versions are affected by CVE-2023-34356?

It affects 1 product.

Products include Peplink Surf Soho Firmware.

How do I fix CVE-2023-34356?

No fix has been published for CVE-2023-34356 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-2023-34356 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-34356 exists.

Sources

Also known as GHSA-p5qp-xrxv-c8wv.