Quick answers
- Is CVE-2026-8479 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-8479 being exploited in the wild.
- How severe is CVE-2026-8479?
- Informational severity, with a CVSS score of 6.9, published 26 May 2026.
- Which products and versions are affected?
- Hitachi Energy IEC 60870-5-104 implementation.
- Is there a fix for CVE-2026-8479?
- 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-2026-8479 attacked?
- It is attacked from the adjacent network, in an operating system.
- Am I affected by CVE-2026-8479?
- Check whether you run Hitachi Energy IEC 60870-5-104 implementation. 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 NULL pointer dereference vulnerability (CWE-476) exists in the Hitachi Energy implementation of the IEC 60870-5-104 protocol. The flaw is triggered when the protocol is configured in bidirectional mode (BCI) and receives a specially crafted sequence of messages over a period of time. An attacker with adjacent network access and low privileges can exploit this to cause a crash of the affected service, resulting in a Denial of Service (DoS) impact. The vulnerability is specific to the bidirectional communication interface configuration.
Affected products
- Hitachi Energy IEC 60870-5-104 implementation
Timeline
- 2026-05-26: disclosed: Initial advisory publication by Hitachi Energy
- 2026-05-26: advisory: NVD record published