What is CVE-2021-33218?

CVE-2021-33218 is a critical-severity vulnerability in Commscope Ruckus Iot Controller, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2021-07-07.

How severe is CVE-2021-33218?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-33218 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Commscope Ruckus Iot Controller

CVE-2021-33218

An issue was discovered in CommScope Ruckus IoT Controller 1.7.1.0 and earlier. There are Hard-coded System Passwords that provide shell access.

Published 2021-07-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (82.7th percentile), scored 2026-09-28.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Commscope Ruckus Iot Controller

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

Public proof-of-concept exploits

References

korelogic.com/advisories.html (Third Party Advisory)
seclists.org/fulldisclosure/2021/May/74 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-33218?: CVE-2021-33218 is a critical-severity vulnerability in Commscope Ruckus Iot Controller, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2021-07-07.
How severe is CVE-2021-33218?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-33218 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.