What is CVE-2026-119740?

CVE-2026-119740 is a medium-severity vulnerability in Nexbox A95x, classified under Missing Authentication for Critical Function. CVSS score: 6.8/10. Published 2026-11-02.

How severe is CVE-2026-119740?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Auth bypass in Nexbox A95x

CVE-2026-119740

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.

Vulnerability class: Broken Authentication

Published 2026-11-02.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Nexbox A95x — versions A7_S905X_v2_2 20160713

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

mstreet97.github.io/security-research/vulnerability-disclosure/embedded/cve/202… (technical-description, exploit)
www.vulncheck.com/advisories/nexbox-a95x-amlogic-s905x-uart-unauthenticated-con… (third-party-advisory)

Frequently asked questions

What is CVE-2026-119740?: CVE-2026-119740 is a medium-severity vulnerability in Nexbox A95x, classified under Missing Authentication for Critical Function. CVSS score: 6.8/10. Published 2026-11-02.
How severe is CVE-2026-119740?: Medium severity. CVSS v3 base score is 6.8 out of 10.