Vulnerability DatabaseCVE-2026-56758
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CVE-2026-56758
Published:July 30, 2026
Updated:August 04, 2026
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.
Affected Packages
libiec61850 (CONAN):
Affected version(s) >=1.6.0 <1.6.2
Fix Suggestion:
Update to version 1.6.2
https://github.com/mz-automation/libiec61850.git (GITHUB):
Affected version(s) >=v1.0.0 <v1.6.2
Fix Suggestion:
Update to version v1.6.2
Related Resources (2)
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-10.json
https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-10
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CVSS v4
Base Score:
6.9
Attack Vector
ADJACENT
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Read
CWE-125
EPSS
Base Score:
0.18