CVE-2026-48741CWE-129CWE-252CWE-476CWE-754

CVE-2026-48741

High · published October 16, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
36.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00432 · 36.4th percentile
Weaknesses
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
Published
2026-10-16T20:18Z
References (4)
https://github.com/mz-automation/libiec61850/commit/7c15310405def00cac628ebde4ce1404bfb8a411 · [email protected]https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2 · [email protected]https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33 · [email protected]https://github.com/mz-automation/libiec61850/security/advisories/GHSA-8mfr-hq64-9w33 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 18 OCT 03:29Z
    EPSS moved — → 0%
    epss
  • 16 OCT 15:45Z
    libIEC61850: Remote NULL dereference in MMS Read alternate-access sub-array path leads to server-side DoS
    cvelistv5
  • 16 OCT 15:45Z
    libIEC61850: Remote NULL dereference in MMS Read alternate-access sub-array path leads to server-side DoS
    cvelistv5