CVE-2023-42135 Command injection in A50

Medium 6.8 Published 15 Jan 2024 Updated 17 Jun 2025

Local attackers with physical USB access can execute arbitrary code on PAX payment terminals by bypassing input validation during partition flashing.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-42135?

CVE-2023-42135 is a medium-severity command injection vulnerability in PAX Technology A50, published on 15 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

PAX A920Pro/A50 devices with PayDroid_8.1.0_Sagittarius_V11.1.50_20230614 or earlier can allow local code execution via parameter injection by bypassing the input validation when flashing a specific partition.

The attacker must have physical USB access to the device in order to exploit this vulnerability.

Weakness: CWE-74

Which versions are affected by CVE-2023-42135?

It affects 1 product.

Products include Paxtechnology Paydroid.

How do I fix CVE-2023-42135?

No fix has been published for CVE-2023-42135 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-2023-42135 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-42135 exists.

Sources

Also known as GHSA-vgrm-64g7-v874.