CVE-2021-34575

Name: CVE-2021-34575
Creator: NVD / NIST
Published: 2021-08-02T11:15:11.417+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.03%

Last modified Jun 17, 2026

CVE-2021-34575 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In MB connect line mymbCONNECT24, mbCONNECT24 in versions <= 2.8.0 an unauthenticated user can enumerate valid users by checking what kind of response the server sends.. EPSS estimates a 1.03% chance of exploitation in the next 30 days.

Description

In MB connect line mymbCONNECT24, mbCONNECT24 in versions <= 2.8.0 an unauthenticated user can enumerate valid users by checking what kind of response the server sends.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.03%

59.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mbconnectline	Mbconnect24	<= 2.8.0
Mbconnectline	Mymbconnect24	<= 2.8.0

References

https://cert.vde.com/de-de/advisories/vde-2021-030Third Party Advisory
https://cert.vde.com/de-de/advisories/vde-2021-030Third Party Advisory

Timeline

Published: Aug 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34575?

In MB connect line mymbCONNECT24, mbCONNECT24 in versions <= 2.8.0 an unauthenticated user can enumerate valid users by checking what kind of response the server sends.

How severe is CVE-2021-34575?

CVE-2021-34575 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.03% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34575?

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-2021-34575?

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

Scan your code now

Source: NVD / NIST