What’s Vulnerable › Vulnerabilities

CVE-2020-35557: Improper Access Validation in products of MB connect line and Helmholz

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-16 · updated 2026-06-17
• Weakness: CWE-269

Description

An issue in MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual in all versions through v2.11.2 allows a logged in user to see devices in the account he should not have access to due to improper use of access validation.

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-2021-003
• https://cert.vde.com/en/advisories/VDE-2022-039
• https://mbconnectline.com/security-advice/
• https://cert.vde.com/en/advisories/VDE-2021-003
• https://cert.vde.com/en/advisories/VDE-2022-039
• https://mbconnectline.com/security-advice/

Get alerted when CVE-2020-35557 or the next vulnerability affects your stack