Quick answers
- Is CVE-2026-82946 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-82946 being exploited in the wild.
- How severe is CVE-2026-82946?
- Medium severity, with a CVSS score of 6.5, published 26 October 2026.
- Which products and versions are affected?
- RT-Labs SOEM 2.0.0 and earlier.
- Is there a fix for CVE-2026-82946?
- 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-2026-82946 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-82946?
- Check whether you run RT-Labs SOEM 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 use-after-free vulnerability exists in SOEM's message handling: when an error response is received, an internal pointer is cleared but message processing continues. If a second message arrives before the timeout period expires, the software attempts to dereference the freed pointer, resulting in a crash. This is triggered remotely by a malicious EtherCAT device sending a two-message sequence.
Affected products
- RT-Labs SOEM 2.0.0 and earlier
Timeline
- 2026-10-26: disclosed