CVE-2021-33527

CRITICAL 9.8CVE-2021-33527 · Published 02/08/2021 · updated 17/06/2026

In short

CVE-2021-33527 is a CRITICAL (CVSS 9.8) vulnerability affecting mbdialup (mbconnectline).
Chance of exploitation in the next 30 days (EPSS): 4.5%, higher than 91.5% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
mbdialup mbconnectline	`≤ 3.9r0.0`	No fix yet

Description

In MB connect line mbDIALUP versions <= 3.9R0.0 a remote attacker can send a specifically crafted HTTP request to the service running with NT AUTHORITY\SYSTEM that will not correctly validate the input. This can lead to an arbitrary code execution with the privileges of the service.

References

cert.vde.com/de-de/advisories/vde-2021-017 · Third Party Advisory

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