What is CVE-2021-34573?

CVE-2021-34573 is a medium-severity vulnerability in Enbra At-Wmbus-16-2, classified under Incorrect Calculation. CVSS score: 6.2/10. Published 2021-09-16.

How severe is CVE-2021-34573?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Vulnerability in Enbra At-Wmbus-16-2

CVE-2021-34573

In Enbra EWM in Version 1.7.29 together with several tested wireless M-Bus Sensors the events backflow and "no flow" are not reconized or misinterpreted. This may lead to wrong values and missing events.

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

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/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 At-Wmbus-16-2 — versions all
Enbra Er-Am Dn 15 — versions ER-AM DN 15/SV all, ER-AM DN 15/TV all
Enbra Ewm — versions 1.7.29
Enbra Ewm 1.7.29 — versions 03.11.2019

Weakness classification (CWE)

CWE-682 — Incorrect Calculation

References

www.fit.vutbr.cz/~polcak/CVE-2021-34573.en (Third Party Advisory)

Frequently asked questions

What is CVE-2021-34573?: CVE-2021-34573 is a medium-severity vulnerability in Enbra At-Wmbus-16-2, classified under Incorrect Calculation. CVSS score: 6.2/10. Published 2021-09-16.
How severe is CVE-2021-34573?: Medium severity. CVSS v3 base score is 6.2 out of 10.