What is CVE-2021-20119?

CVE-2021-20119 is a high-severity vulnerability in Commscope Arris Surfboard Sb8200, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2021-11-09.

How severe is CVE-2021-20119?

High severity. CVSS v3 base score is 7.1 out of 10.

Auth bypass in Commscope Arris Surfboard Sb8200

CVE-2021-20119

The password change utility for the Arris SurfBoard SB8200 can have safety measures bypassed that allow any logged-in user to change the administrator password.

Vulnerability class: Broken Access Control

Published 2021-11-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000

Affected products

Commscope Arris Surfboard Sb8200
Commscope Arris Surfboard Sb8200 Firmware — versions ab01.02.053.01_112320_193.0a.nsh
Arris Surfboard Sb8200 — versions Arris SurfBoard SB8200 AB01.02.053.01_112320_193.0A.NSH

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

www.tenable.com/security/research/tra-2021-49 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-20119?: CVE-2021-20119 is a high-severity vulnerability in Commscope Arris Surfboard Sb8200, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2021-11-09.
How severe is CVE-2021-20119?: High severity. CVSS v3 base score is 7.1 out of 10.