How severe is CVE-2021-36630?

CVE-2021-36630 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-36630 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36630?

CVE-2021-36630 primarily affects Ruckuswireless Sz-300 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-36630?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-36630 published?

CVE-2021-36630 was published on 2023-01-18 and last updated on 2026-07-09.

CVE-2021-36630

CVE-2021-36630 is a high-severity vulnerability in Ruckuswireless Sz-300 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Ruckuswireless Sz-300 Firmware
Published: 2023-01-18
Last modified: 2026-07-09

Description

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

Frequently asked questions

What is CVE-2021-36630?: DDOS reflection amplification vulnerability in eAut module of Ruckus Wireless SmartZone controller that allows remote attackers to perform DOS attacks via crafted request.
How severe is CVE-2021-36630?: CVE-2021-36630 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-36630 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36630?: CVE-2021-36630 primarily affects Ruckuswireless Sz-300 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-36630?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-36630 published?: CVE-2021-36630 was published on 2023-01-18 and last updated on 2026-07-09.

References

Affected products (4)

cpe:2.3:o:ruckuswireless:sz-300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ruckuswireless:sz-144_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ruckuswireless:sz-100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ruckuswireless:vsz_firmware:*:*:*:*:*:*:*:*

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CVE-2020-22658 — Critical (CVSS 9.8): In Ruckus R310 10.5.1.0.199, Ruckus R500 10.5.1.0.199, Ruckus R600 10.5.1.0.199, Ruckus T300 10.5.1.0.199, Ruckus T301n…
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