CVE-2013-20003
Z-Wave devices from Sierra Designs (circa 2013) and Silicon Labs (using S0 security) may use a known, shared network key of all zeros, allowing an attacker within radio range to spoof Z-Wave traffic.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.57%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Z-Wave devices from Sierra Designs (circa 2013) and Silicon Labs (using S0 security) may use a known, shared network key of all zeros, allowing an attacker within radio range to spoof Z-Wave traffic.
- CVSS 3.1
- 8.3 HIGHCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.57% probability · 47th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-327, CWE-338
- Affected
- silabs/zgm130s037hgn firmware · silabs/zm5202 firmware · silabs/zm5101 firmware · silabs/zgm2305a27hgn firmware · silabs/zgm230sb27hgn firmware
- Source
- cret@cert.org
EPSS 0.6% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://orangecyberdefense.com/global/blog/sensepost/blackhat-conference-z-wave-security/Third Party Advisory
- https://sensepost.com/cms/resources/conferences/2013/bh_zwave/Security%20Evaluation%20of%20Z-Wave_WP.pdfTechnical Description, Third Party Advisory
- https://www.pentestpartners.com/security-blog/z-shave-exploiting-z-wave-downgrade-attacks/Exploit, Third Party Advisory
- https://orangecyberdefense.com/global/blog/sensepost/blackhat-conference-z-wave-security/Third Party Advisory
- https://sensepost.com/cms/resources/conferences/2013/bh_zwave/Security%20Evaluation%20of%20Z-Wave_WP.pdfTechnical Description, Third Party Advisory
- https://www.pentestpartners.com/security-blog/z-shave-exploiting-z-wave-downgrade-attacks/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.