Quick answers
- Is CVE-2026-40839 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-40839 being exploited in the wild.
- How severe is CVE-2026-40839?
- Medium severity, with a CVSS score of 6.5, published 27 May 2026.
- Which products and versions are affected?
- MB connect line mbCONNECT24 <= 2.20.0; MB connect line mymbCONNECT24 <= 2.20.0.
- Is there a fix for CVE-2026-40839?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-40839 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-40839?
- Check whether you run MB connect line mbCONNECT24 or MB connect line mymbCONNECT24 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A SQL injection vulnerability exists in the 'getComponentScalings' function of MB connect line mbCONNECT24 and mymbCONNECT24 firmware versions up to and including 2.20.0. The flaw is caused by improper neutralization of special elements within a SQL SELECT command. A remote attacker with low-privileged credentials can exploit this vulnerability over the network without user interaction. Successful exploitation allows the attacker to perform unauthorized database queries, leading to a total loss of confidentiality for the stored data. The vulnerability is tracked as CVE-2026-40839 and was disclosed alongside several other SQLi flaws in the same product suite.
Affected products
- MB connect line mbCONNECT24 <= 2.20.0
- MB connect line mymbCONNECT24 <= 2.20.0
Timeline
- 2026-05-27: disclosed: Initial advisory publication by CERT VDE and NVD.