What’s Vulnerable › Vulnerabilities

CVE-2021-34574: Password policy evasion in products of MB connect line and Helmholz

• Severity: medium (CVSS 4.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-02 · updated 2026-06-17
• Weakness: CWE-669

Description

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: through 2.11.2
• Helmholz myREX24.virtual: through 2.11.2
• MB connect line mbCONNECT24: through 2.11.2
• MB connect line mymbCONNECT24: through 2.11.2

References

• https://cert.vde.com/en/advisories/VDE-2021-030
• https://cert.vde.com/en/advisories/VDE-2022-039
• https://cert.vde.com/en/advisories/VDE-2021-030
• https://cert.vde.com/en/advisories/VDE-2022-039

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