CVE-2026-48741

libIEC61850 is an open-source implementation of IEC 61850 client and server protocols including MMS, GOOSE, Sampled Values, and R-Session. Prior to 1.6.2, alternateArrayAccess in src/mms/iso_mms/server/mms_read_service.c does not validate an alternate-access sub-array range when numberOfElements is greater than zero. An out-of-range MmsValue_getElement call returns NULL, and the sub-array branch passes that value to MmsValue_isDeletable, causing a NULL pointer dereference. A remote MMS Read request can therefore crash servers whose data models contain arrays, while the single-element error path handles the same invalid index safely. This issue is fixed in version 1.6.2.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/mz-automation/libiec61850/commit/7c15310405def00cac628ebde4ce1404bfb8a411
https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2
https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33
https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33

Configurations

No configuration.

History

21 Oct 2026, 03:17

Type	Values Removed	Values Added
References	~~() https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33 -~~	() https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33 -

16 Oct 2026, 16:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-16 16:18

Updated : 2026-10-21 03:17

NVD link : CVE-2026-48741

Mitre link : CVE-2026-48741

CVE.ORG link : CVE-2026-48741

JSON object : View

Products Affected

No product.

CWE

CWE-129

Improper Validation of Array Index

CWE-252

Unchecked Return Value

CWE-476

NULL Pointer Dereference

CWE-754

Improper Check for Unusual or Exceptional Conditions

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