NULL pointer dereference in libIEC61850 - CVE-2026-48741
Published: June 18, 2026
Vulnerability identifier: #VU134847
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: CVE-2026-48741
CWE-ID: CWE-476
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 a NULL pointer dereference in alternateArrayAccess() in the MMS read service when processing out-of-range sub-array read requests using alternate-access indexRange. A remote attacker can send a specially crafted MMS Read request to cause a denial of service.
Only MMS server implementations that use data models containing arrays are vulnerable.
Affected software
libIEC61850
How to mitigate CVE-2026-48741
Install security update from vendor's website.
libIEC61850 - update to 1.6.2