CVE-2021-34574: Helmholz MYREX24

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

In MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual in all versions through v2.11.2 an authenticated attacker can change the password of his account into a new password that violates the password policy by intercepting and modifying the request that is send to the server.

Affected products

• Helmholz MYREX24: up to and including 2.11.2
• Helmholz MYREX24.VIRTUAL: up to and including 2.11.2
• Mbconnectline MBCONNECT24: up to and including 2.11.2
• Mbconnectline MYMBCONNECT24: up to and including 2.11.2

Published 2021-08-02. Last modified 2026-06-17.