CVE-2021-36630Known exploitationPublic exploitNetwork attack vector

Service interruption via eAut UDP reflection amplification

Published Jan 18, 2023 · Updated Jul 9, 2026

Reflection amplification in the RUCKUS SmartZone eAut module allows remote attackers to interrupt another device via crafted UDP requests. The service on UDP port 9001 converts a malformed request smaller than 30 bytes into a 5,000–8,000-byte error response. Network access and source-address spoofing are required; reflected traffic consumes the victim's network capacity without altering controller data.

CVSS severity7.5
High
EPSS probability2.22%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflection amplification in the RUCKUS SmartZone eAut module allows remote attackers to interrupt another device via crafted UDP requests. The service on UDP port 9001 converts a malformed request smaller than 30 bytes into a 5,000–8,000-byte error response. Network access and source-address spoofing are required; reflected traffic consumes the victim's network capacity without altering controller data.

The record

CVE
CVE-2021-36630
Published
Jan 18, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-770, T1498.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1498.002Network Denial of Service: Reflection Amplification

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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