CVE-2020-35557

Name: CVE-2020-35557
Creator: NVD / NIST
Published: 2021-02-16T16:15:13.05+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.97%

Last modified Jun 17, 2026

CVE-2020-35557 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.97% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.97%

57.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-269

Affected Software

Vendor	Product	Versions
Mbconnectline	Mbconnect24	<= 2.11.2
Mbconnectline	Mymbconnect24	<= 2.11.2
Helmholz	Myrex24	<= 2.11.2
Helmholz	Myrex24.Virtual	<= 2.11.2

References

https://cert.vde.com/en/advisories/VDE-2021-003Third Party Advisory
https://cert.vde.com/en/advisories/VDE-2022-039Third Party Advisory
https://mbconnectline.com/security-advice/Vendor Advisory
https://cert.vde.com/en/advisories/VDE-2021-003Third Party Advisory
https://cert.vde.com/en/advisories/VDE-2022-039Third Party Advisory
https://mbconnectline.com/security-advice/Vendor Advisory

Timeline

Published: Feb 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-35557?

How severe is CVE-2020-35557?

CVE-2020-35557 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.97% probability of exploitation in the next 30 days.

How do I fix CVE-2020-35557?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-35557?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST