Security readout for executives and security teams
Plain-English summary
Some Z-Wave devices using older S0 security may share a known all-zero network key. A nearby radio attacker could spoof Z-Wave traffic. The sources do not prove active exploitation or provide a universal patch, so urgency depends on whether affected S0 devices remain in use.
Executive priority
Treat this as a targeted physical-proximity risk, not an internet-scale emergency. Prioritize sites where Z-Wave controls business-critical, safety, or physical-access functions, then retire or validate legacy S0 devices.
Technical view
CVE-2013-20003 describes insecure cryptographic key use in Z-Wave S0 implementations from Sierra Designs-era devices and Silicon Labs Z-Wave S0. The issue maps to CWE-327. Exposure requires radio proximity and affected S0 behavior, with potential spoofing of Z-Wave traffic.
Likely exposure
Likely exposure is limited to environments still using affected Z-Wave S0 devices or legacy Sierra Designs-era Z-Wave hardware. Asset inventories should confirm controller, device, and security-mode details before assuming impact.
Exploitation context
The cited research discusses Z-Wave security weaknesses and downgrade-related attacks. The CVE is not marked KEV, and the provided sources do not establish active exploitation in the wild.
Researcher notes
Evidence is strongest for the cryptographic design issue and radio-range spoofing risk. The bundle lacks CVSS, affected model lists, patch details, and KEV evidence, so validation should focus on local device inventory and vendor-specific documentation.
Mitigation direction
- Inventory Z-Wave devices and identify any using S0 security.
- Check Silicon Labs, device vendor, and controller vendor guidance.
- Prioritize replacement or reconfiguration of devices relying on vulnerable S0 behavior.
- Avoid using affected devices for high-impact physical or operational actions.
- Review Z-Wave controller settings for stronger supported inclusion modes.
Validation and detection
- Confirm each Z-Wave device model, firmware, controller, and security mode.
- Identify any S0 inclusions or legacy Sierra Designs-era devices.
- Review controller logs for unexpected Z-Wave commands or device state changes.
- Check whether vendors document fixes, replacement guidance, or unsupported status.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-327: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2013-20003 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://sensepost.com/cms/resources/conferences/2013/bh_zwave/Security%20Evaluation%20of%20Z-Wave_WP.pdfCVE reference · x_refsource_MISC
- https://www.pentestpartners.com/security-blog/z-shave-exploiting-z-wave-downgrade-attacks/CVE reference · x_refsource_MISC
- https://orangecyberdefense.com/global/blog/sensepost/blackhat-conference-z-wave-security/CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use of a Broken or Risky Cryptographic Algorithm
Use of a Broken or Risky Cryptographic Algorithm represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.