CVE-2026-8479

MEDIUM EPSS 6.7%

Published May 26, 20261mo ago · Modified Jun 17, 20262w ago

6.9 CVSS 4.0

Medium

Published May 26, 2026 1mo ago

Last Modified Jun 17, 2026 2w ago

Description

IEC 60870-5-104 used in bidirectional mode in RTU500 is vulnerable for a NULL pointer dereferencing, if a specially crafted sequence of messages is sent for a certain time, causing Denial of Service impact. Product is only affected if IEC 60870-5-104 functionality in bidirectional mode (BCI) is configured.

CVSS Details

Base Score

6.9

Exploitability

—

Impact

—

Vector string

CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector Adjacent

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope X

Threat Intelligence

EPSS Exploit Probability

6.7% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

References 1

publisher.hitachienergy.com https://publisher.hitachienergy.com/preview?DocumentID=8DBD000252&LanguageCode=en&DocumentPartId=&Action=Launch

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.