What’s Vulnerable › Vulnerabilities

CVE-2021-34572: Insufficient Verification of Data Authenticity in Enbra EWM (replay attack)

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-16 · updated 2026-06-17
• Weakness: CWE-345

Description

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.

Affected products

• Enbra EWM 1.7.29: 1.7.29

References

• https://www.fit.vutbr.cz/~polcak/CVE-2021-34572.en
• https://www.fit.vutbr.cz/~polcak/CVE-2021-34572.en

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