CVE-2022-24611Public exploit

Network outage via spoofed NonceGet request queueing

Published May 17, 2022 · Updated Jul 9, 2026

Denial of service in Silicon Labs Z-Wave 500 series firmware allows local users to block S0/S2 network operation with NonceGet requests. The controller honors requests spoofed from an included but offline NodeID and waits 3 to 20 seconds for a reply, preventing new nonce issuance. Radio range and an included but absent NodeID are required; one request every two seconds sustains the outage, and service resumes after the traffic stops.

CVSS severity6.5
Medium
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Silicon Labs Z-Wave 500 series firmware allows local users to block S0/S2 network operation with NonceGet requests. The controller honors requests spoofed from an included but offline NodeID and waits 3 to 20 seconds for a reply, preventing new nonce issuance. Radio range and an included but absent NodeID are required; one request every two seconds sustains the outage, and service resumes after the traffic stops.

The record

CVE
CVE-2022-24611
Published
May 17, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 17, 2022CVE 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5GitHub Advisory DatabaseCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.1NIST NVDAV:A/AC:L/Au:N/C:N/I:N/A:C

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

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

Technologies

Your stack

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Your stack

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