CVE-2013-20003Public exploit

Device control via zero-key exchange

Published Feb 4, 2022 · Updated Sep 16, 2024

Key-exchange authentication bypass in Z-Wave S0 allows physically proximate attackers to spoof encrypted device-control traffic. An affected firmware key-exchange handler loads a hard-coded 16-byte zero temporary key without first validating the network key already provisioned in EEPROM. Exploitation requires radio range and packet-injection hardware; it can replace the shared key and send unauthorized commands to locks or other devices.

CVSS severity8.3
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Key-exchange authentication bypass in Z-Wave S0 allows physically proximate attackers to spoof encrypted device-control traffic. An affected firmware key-exchange handler loads a hard-coded 16-byte zero temporary key without first validating the network key already provisioned in EEPROM. Exploitation requires radio range and packet-injection hardware; it can replace the shared key and send unauthorized commands to locks or other devices.

The record

CVE
CVE-2013-20003
Published
Feb 4, 2022
Updated
Sep 16, 2024
Vendor
Sigma Designs
Product
Z-Wave
Classifications
CWE-338, CWE-327, T1040
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=S0
  2. Affected versionversion=S0 <S0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Sigma Designs · Z-Waveversion=S0; version=S0 <S0

Published CVSS scores

8.3NIST NVDCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
7.9NIST NVDAV:A/AC:M/Au:N/C:C/I:C/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.

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

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

CWE-338Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
CWE-327Use of a Broken or Risky Cryptographic Algorithm
T1040Network Sniffing

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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