CVE-2021-34571 json
Hard-coded Credentials in Enbra Wireless M-Bus devices
published 2021-09-16 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21221
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 13%
- public exploits
- 0
- none known
Summary
Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an option to change the encryption key. An adversary can learn all information that is available in Enbra EWM.
Exploit prediction
0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 2.9 | AV:A/AC:M/Au:N/C:P/I:N/A:N |
Affected products
- Enbra AT-WMBUS-16-2
- Enbra ER-AM DN 15
- Enbra EWM 1.7.29
Classification
- Weakness
-
- CWE-798 Use of Hard-coded Credentials
References
-
fit.vutbr.cz
/~polcak/CVE-2021-34571.en
third-party-advisory
Sources
- CVE List CVE-2021-34571
- NVD CVE-2021-34571
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