How to fix or mitigate CVE-2026-40842?

Within 24 hours: Audit your environment for systems running mbCONNECT24, mymbCONNECT24, myREX24V2, or myREX24V2.virtual versions 2.20.0 and earlier; restrict network access via firewall or VPN-only policy. Within 7 days: Establish contact with MB connect line support for official patch timeline; brief operations and information security leadership on the gap and interim controls. Within 30 days: Deploy database activity monitoring and Web Application Firewall protections; monitor vendor advisories for patch availability; develop and validate upgrade strategy for all affected systems.

CVE-2026-40842

Q: What is the CVSS score of CVE-2026-40842?

CVE-2026-40842 has a CVSS 4.0 base score of 7.1 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2026-32141 HIGH

SQL Injection (CWE-89)

2026-05-27 info@cert.vde.com

GHSA-chjr-v576-pgx2

SQLi

7.1

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

7.1 HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

May 27, 2026 - 20:23 vuln.today

DescriptionCVE.org

An low privileged remote attacker can exploit an unauthenticated SQL Injection vulnerability in the getWidgetTags function due to improper neutralization of special elements in a SQL SELECT command. This can result in a total loss of confidentiality.

AnalysisAI

SQL injection in MB connect line's remote-maintenance portals — mbCONNECT24, mymbCONNECT24, and the myREX24V2 / myREX24V2.virtual cloud variants (all versions up to and including 2.20.0) — lets a low-privileged remote attacker manipulate a SQL SELECT statement in the getWidgetTags function and read arbitrary database contents, causing a total loss of confidentiality. The flaw is confidentiality-only (no integrity or availability impact) and carries a CVSS 4.0 base score of 7.1. EPSS is very low (0.03%, 11th percentile) and CISA's SSVC framework rates exploitation as 'none'; there is no public exploit identified at time of analysis and it is not on CISA KEV.