Quick answers
- Is CVE-2026-86326 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-86326 being exploited in the wild.
- How severe is CVE-2026-86326?
- Informational severity, published 2 October 2026.
- Which products and versions are affected?
- Moxa Protocol Gateways.
- Is there a fix for CVE-2026-86326?
- 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-2026-86326 attacked?
- It is attacked with local access, in a network appliance.
- Am I affected by CVE-2026-86326?
- Check whether you run Moxa Protocol Gateways. 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 a failure to validate cryptographic signatures on firmware images before installation (improper verification of cryptographic signature, CWE-347 equivalent). An authenticated attacker with administrative privileges can exploit this via the firmware update interface to install unsigned or forged firmware. Successful exploitation yields arbitrary code execution with system privileges, persistence across firmware updates, and full device compromise.
Affected products
- Moxa Protocol Gateways
Timeline
- 2026-10-02: disclosed