Quick answers
- Is CVE-2026-3869 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-3869 being exploited in the wild.
- How severe is CVE-2026-3869?
- Informational severity, published 11 September 2026.
- Which products and versions are affected?
- Schneider Electric PLC Unknown.
- Is there a fix for CVE-2026-3869?
- 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-2026-3869 attacked?
- It is attacked over the network or with local access.
- Am I affected by CVE-2026-3869?
- Check whether you run Schneider Electric PLC 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
The vulnerability is an incorrect implementation of an authentication algorithm (CWE-303) in Schneider Electric PLCs. The flaw allows authentication bypass when lower-privilege application projects are present on the device. An attacker with network or local access to the PLC could exploit this to circumvent authentication mechanisms and access protected functions or data. The vulnerability requires specific preconditions (lower application level present) but could result in complete loss of confidentiality, integrity, and availability of the PLC system. Patch availability and specific affected versions are not detailed in the available references.
Affected products
- Schneider Electric PLC Unknown
Timeline
- 2026-09-11: disclosed