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Vulnerability record · public intelligence
CVE-2021-33526
HIGH

Privilege escalation in mbDIALUP <= 3.9R0.0

Published Aug 2, 2021 · Updated Oct 23, 2026

Severity · CVSSHIGH · 7.8
Known exploitationNot listed
EPSS / likelihood0.25%
QFinch risk score10 / 100

Original summary

Normalized public record · Updated Oct 23, 2026

Privilege escalation in mbDIALUP <= 3.9R0.0

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

In MB connect line mbDIALUP versions <= 3.9R0.0 a low privileged local attacker can send a command to the service running with NT AUTHORITY\SYSTEM instructing it to execute a malicous OpenVPN configuration resulting in arbitrary code execution with the privileges of the service.

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or rangeFix status
Consult the referenced vendor advisory for affected versions.Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

  1. Confirm the affected product and reachable code path exist in your environment.
  2. Apply the vendor-supported patch or mitigation from the primary advisory.
  3. Rescan the exact deployed revision and retain verification evidence.
Review primary references

Evidence coverage

CVENVDEPSS
SSVC priority
MEDIUM
Confidence
10%
Aliases
None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

  1. cert.vde.com ↗

Record history

Published Aug 2, 2021 · Last refreshed Oct 23, 2026