Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-8479

Severity CVSS v4.0:
MEDIUM
Type:
CWE-476 NULL Pointer Dereference
Publication date:
26/05/2026
Last modified:
26/05/2026

Description

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

Impact

Vector 4.0
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 CVSS v4.0 Severity and Metrics:

Base Score: 6.90 MEDIUM
Vector: 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

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): Low
User Interaction (UI): None
Confidentiality (VC): None
Integrity (VI): None
Availability (VA): High
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None

Base Score 4.0
6.90
Severity 4.0
MEDIUM

References to Advisories, Solutions, and Tools