CVE-2021-34580

7.5 highEPSS 1.0%

High (7.5) in mbconnectline. EPSS 1.0% chance of exploitation in the next 30 days.

In mymbCONNECT24, mbCONNECT24 <= 2.9.0 an unauthenticated user can enumerate valid backend users by checking what kind of response the server sends for crafted invalid login attempts.

Severity

CVSS 3.1

7.5 high

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

EPSS: 1.0% chance of exploitation in the next 30 days; higher than 63% of CVEs (scores of 2026-10-31)
CWEs: CWE-203, CWE-204
Published: 2021-10-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mbconnectline:mbconnect24
mbconnectline:mymbconnect24

References

https://cert.vde.com/en/advisories/VDE-2021-037/
https://cert.vde.com/en/advisories/VDE-2021-037/

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