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CVE-2021-33221

71
FAUCET Score

CVE-2021-33221 is a critical vulnerability affecting CommScope Ruckus IoT Controller versions 1.7.1.0 and earlier, stemming from unauthenticated API endpoints (CWE-306). With a CVSS score of 9.8, it allows unauthenticated attackers to remotely achieve full compromise (confidentiality, integrity, and availability) with low attack complexity. While not currently listed in CISA's KEV catalog, a Nuclei template exists for information disclosure, indicating potential for exploitation, though there is no evidence of active exploitation, Metasploit modules, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.7.1.0CPE matchmatch criteria
cpe:2.3:a:commscope:ruckus_iot_controller:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
56.99%
Probability of exploitation in next 30 days
EPSS Percentile
99.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2021-33221 · Jul 26, 2021
This CVE's current EPSS score of 0.5699 is in the 97th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

nessuspatch availablevia llm_extracted
Fixed in: 1.0
View patch
debianvendor investigatingvia llm_extracted
View patch

Vendor Advisories (2)

debianllm-debian-782452a350927509

Multiple Vulnerabilities in RUCKUS IoT Controller (CVE-2021-33221, CVE- 2021-33220, CVE-2021-33219, CVE-2021-33218, CVE-2021-33217, CVE-2021- 33216, and CVE-2021-33215)

May 25, 2021
nessusllm-nessus-c9eaaa0dc1cac254

Multiple Vulnerabilities in RUCKUS IoT Controller (CVE-2021-33221, CVE- 2021-33220, CVE-2021-33219, CVE-2021-33218, CVE-2021-33217, CVE-2021- 33216, and CVE-2021-33215)

May 25, 2021

References

seclists.org / fulldisclosure/2021/May/72
ExploitMailing ListThird Party Advisory
korelogic.com / advisories.html
Third Party Advisory