CVE-2026-119740

MEDIUM 6.8

Nexbox A95X Amlogic S905X UART Unauthenticated Console Access

CVSS Score

6.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306
Vendor	nexbox
Product	a95x
Published	Nov 2, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Nexbox / A95X

A7_S905X_v2_2 20160713

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Matteo Strada (mstreet)