CVE Catalog

CVE-2026-56758

MediumCVSS 6.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.30%

21th percentile - higher than 21% of all known CVEs

Summary

The ACSE layer contains a flaw in the processing of AARQ PDUs during MMS connection establishment. When parsing certain fields within the calling AP title, an attacker controlled length value of zero or one may cause the parser to read past the end of a heap buffer.

Risk Assessment

An attacker can remotely crash the MMS connection establishment process, disrupting communication in power automation systems and potentially causing power supply interruptions.

Recommendation

Install the update provided by the power automation system vendor that adds length validation in the ACSE layer.

Related vulnerabilities

Original NVD description (English source)

The ACSE layer contains a flaw in the processing of AARQ PDUs during MMS connection establishment. When parsing certain fields within the calling AP title, an attacker controlled length value of zero or one may cause the parser to read past the end of a heap buffer.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS