Vulnerability in CODESYS Control RTE (SL)

[ Description ]Official description

Affected products do not properly synchronize access to their monitoring functionality. When multiple clients send concurrent requests, this may lead to incorrect reads or writes, or to corruption of internal memory structures. An authenticated remote attacker with monitoring access can exploit this issue to cause incorrect data processing or a denial-of-service condition.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund1 Oct 2026WID-SEC-2026-3710

  CODESYS Control Runtime and Gateway Client: Multiple vulnerabilities Translated from German

  CVE-2026-79625CVE-2026-76992

[ References ]References

• www.certvde.com/en/advisories/VDE-2026-097