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

Status: published. Published: 2026-11-02. Updated: 2026-11-02.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Nexbox / A95X: A7_S905X_v2_2 20160713 (affected, custom). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 7 (high); 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; source: CNA: VulnCheck

- CVSS 3.1: 6.8 (medium); CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-306

## Exploit evidence

- exploit: https://mstreet97.github.io/security-research/vulnerability-disclosure/embedded/cve/2026/10/29/From-UART-to-root-android-version.html (CNA: VulnCheck)

## References

- https://mstreet97.github.io/security-research/vulnerability-disclosure/embedded/cve/2026/10/29/From-UART-to-root-android-version.html (CNA: VulnCheck; technical-description, exploit)

- https://www.vulncheck.com/advisories/nexbox-a95x-amlogic-s905x-uart-unauthenticated-console-access (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-119740; retrieved 2026-11-02; source updated 2026-11-02

Revision: f4ace8cef09adfbc846af15c863b83f67522d797b7843027a01335644f7b3128

Canonical: https://y2.dev/cve/CVE-2026-119740

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