Helmholz mbCONNECT24 getVpnData sql injection

Summaryinfo

A vulnerability labeled as critical has been found in Helmholz mbCONNECT24, mymbCONNECT24, myREX24V2 and myREX24V2.virtual. Affected is the function getVpnData. Such manipulation leads to sql injection. This vulnerability is uniquely identified as CVE-2026-40820. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Helmholz mbCONNECT24, mymbCONNECT24, myREX24V2 and myREX24V2.virtual (the affected version unknown). It has been rated as critical. Affected by this issue is the function getVpnData. The manipulation with an unknown input leads to a sql injection vulnerability. Using CWE to declare the problem leads to CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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

The advisory is shared for download at certvde.com. This vulnerability is handled as CVE-2026-40820 since 04/15/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/12/2026). The MITRE ATT&CK project declares the attack technique as T1505.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Helmholz

Name

• mbCONNECT24
• mymbCONNECT24
• myREX24V2
• myREX24V2.virtual

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