CVE-2026-17539
Hitachi Energy RTU500 NULL Pointer Dereference Denial of Service Vulnerability
Description
RTU500 has a vulnerability, where high-load scenarios, such as sending GI requests at short intervals, may cause a NULL pointer dereference in the last entry of the enhanced message queue. This can cause a BCI_IEC104 fatal write error, resulting in connection interruption and restart, and ultimately a denial of service for bidirectional IEC 60870-5-104 communication.
INFO
Published Date :
Sept. 3, 2026, 7:59 a.m.
Last Modified :
Sept. 3, 2026, 7:59 a.m.
Remotely Exploit :
Yes !
Source :
Hitachi Energy
Affected Products
The following products are affected by CVE-2026-17539
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | e383dce4-0c27-4495-91c4-0db157728d17 | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update RTU500 firmware to the latest version.
- Test communication under high-load scenarios.
- Monitor connection stability after update.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-17539 vulnerability anywhere in the article.