CVE-2021-34580

HIGH 7.5CVE-2021-34580 · Published 27/10/2021 · updated 17/06/2026

In short

CVE-2021-34580 is a HIGH (CVSS 7.5) vulnerability affecting mbconnect24 (mbconnectline), mymbconnect24 (mbconnectline).
Chance of exploitation in the next 30 days (EPSS): 1.0%, higher than 64.0% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
mbconnect24 mbconnectline	`≤ 2.9.0`	No fix yet
mymbconnect24 mbconnectline	`≤ 2.9.0`	No fix yet

Description

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.

References

cert.vde.com/en/advisories/VDE-2021-037 · Third Party Advisory

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Package

Affected versions

Patched versions

mbconnect24

mbconnectline

≤ 2.9.0

No fix yet

mymbconnect24

mbconnectline

≤ 2.9.0

No fix yet

More vulnerabilities in mbconnect24

See all →