Out-of-bounds read in libIEC61850 - #VU136973
Published: July 7, 2026
Vulnerability identifier: #VU136973
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in checkDataSetAccess when handling association-specific dynamic dataset creation requests. A remote attacker can send a specially crafted defineNamedVariableList request to cause a denial of service.
Only instances with dynamic dataset service enabled and a dataset access handler installed are vulnerable.
Affected software
libIEC61850
Remediation
Install security update from vendor's website.
libIEC61850 - update to 1.6.2