CVE-2021-36630

Exp

DDOS reflection amplification vulnerability in eAut module of Ruckus Wireless SmartZone controller that allows remote attackers to perform DOS attacks via crafted request.

Published: 2023-01-18 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-36630 is rated High Exploit Risk (68.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.35%). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-36630

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-36630

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 39.92% 2.35% -37.56%
2 2026-01-27 34.00% 39.92% +5.92%
3 2026-01-19 — 34.00% —

Full EPSS history (24 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-36630

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2021-36630

Affected software / configurations for CVE-2021-36630

Vendor Product Version Raw CPE
ruckuswireless sz-300_firmware <= 3.6.2 cpe:2.3:o:ruckuswireless:sz-300_firmware:*:*:*:*:*:*:*:*
ruckuswireless sz-144_firmware <= 3.6.2 cpe:2.3:o:ruckuswireless:sz-144_firmware:*:*:*:*:*:*:*:*
ruckuswireless sz-100_firmware <= 3.6.2 cpe:2.3:o:ruckuswireless:sz-100_firmware:*:*:*:*:*:*:*:*
ruckuswireless vsz_firmware <= 3.6.2 cpe:2.3:o:ruckuswireless:vsz_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-36630

URL Tags
http://ruckus.com Not Applicable
http://smartzone-100.com Broken Link
https://anquan.baidu.com/article/1434 Exploit Mitigation Technical Description Third Party Advisory
https://github.com/lixiang957/CVE-2021-36630 Exploit Third Party Advisory
https://www.commscope.com/globalassets/digizuite/921070-faq-security-advisory-id-20210719-v1-0.pdf Vendor Advisory
https://www.freebuf.com/articles/web/260338.html Exploit Third Party Advisory
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