What is CVE-2021-34572?

CVE-2021-34572 is a medium-severity vulnerability in Enbra Ewm, classified under Insufficient Verification of Data Authenticity. CVSS score: 6.5/10. Published 2021-09-16.

How severe is CVE-2021-34572?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Enbra Ewm

CVE-2021-34572

Enbra EWM 1.7.29 does not check for or detect replay attacks sent by wireless M-Bus Security mode 5 devices. Instead timestamps of the sensor are replaced by the time of the readout even if the data is a replay of earlier data.

Published 2021-09-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.002 (12.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Enbra Ewm — versions 1.7.29
Enbra Ewm 1.7.29 — versions 03.11.2019

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

www.fit.vutbr.cz/~polcak/CVE-2021-34572.en (Third Party Advisory)

Frequently asked questions

What is CVE-2021-34572?: CVE-2021-34572 is a medium-severity vulnerability in Enbra Ewm, classified under Insufficient Verification of Data Authenticity. CVSS score: 6.5/10. Published 2021-09-16.
How severe is CVE-2021-34572?: Medium severity. CVSS v3 base score is 6.5 out of 10.