CVE-2026-40823 Authenticated SQLi in DevSerialReset function
An attacker can exploit SQL injection in the DevSerialReset function to read the entire database and modify values in non-critical tables.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40823?
CVE-2026-40823 is a high-severity SQL injection vulnerability in Helmholz mbCONNECT24, published on 27 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A high privileged remote attacker can exploit an unauthenticated SQL Injection vulnerability in the DevSerialReset function due to improper neutralization of special elements in a SQL UPDATE command allowing for reading the whole database and changing values in a non critical table. This can result in a total loss of confidentiality and some loss of integrity.
Weakness: CWE-89
Which versions are affected by CVE-2026-40823?
How do I fix CVE-2026-40823?
No fix has been published for CVE-2026-40823 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-40823 being exploited?
There is no known exploitation of CVE-2026-40823 in the wild and no public exploit code.
Sources
Also known as GHSA-5r32-5pqx-5hhc.