November 14, 2026

CVE Watchtower

CVE-2026-60042MB connect line mbCONNECT24 Authorization Bypass Through User-Controlled Key

NVD

Vulnerability Summary

An unauthenticated remote attacker can perform an authentication bypass on the com_check function, potentially triggering traffic on other systems and email alerts. This can result in some loss of availability due to higher system loads.
Severity Level
MEDIUM(6.9)
Published Date
Nov 10, 2026
Last Modified
Nov 10, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.39%Probability
Root Weakness (CWE)
CWE-639: Authorization Bypass Through User-Controlled Key ↗
The system does not prevent one user from accessing another user data or record by modifying the key value identifying the data.
CVSS v4.0 Base Metrics — Score 6.9 (MEDIUM)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)None
Integrity (Vulnerable System)None
Availability (Vulnerable System)None
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)Low
Show CVSS v3.x metrics (score 5.3)
CVSS v3.1 Base Metrics — Score 5.3 (MEDIUM)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityLow

Affected & Patched Versions

Affected Versions
  • MB connect line mbCONNECT24 >= 2.0.0 and < 2.21.0
  • MB connect line mymbCONNECT24 >= 2.0.0 and < 2.21.0
  • Helmholz myREX24V2 >= 2.0.0 and < 2.21.0
  • Helmholz myREX24V2.virtual >= 2.0.0 and < 2.21.0
Patched Versions
  • MB connect line mbCONNECT24 2.21.0
  • MB connect line mymbCONNECT24 2.21.0
  • Helmholz myREX24V2 2.21.0
  • Helmholz myREX24V2.virtual 2.21.0

What to do

Fix it during your normal patch cycle. No exploitation is confirmed yet.

  1. Check whether you run MB connect line mbCONNECT24 and which version.
  2. Update to a patched version listed above, then confirm the new version.

Timeline

  • Nov 10, 2026Published
  • Nov 10, 2026Record last modified

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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External References

Data last checked: Nov 14, 2026 01:09 UTC