MZ Automation libIEC61850 NULL Pointer Dereference

published 2022-09-23 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-35194

cvss: 8.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits: 0; none known

MZ Automation's libIEC61850 (versions 1.4 and prior; version 1.5 prior to commit a3b04b7bc4872a5a39e5de3fdc5fbde52c09e10e) uses a NULL pointer in certain situations. which could allow an attacker to crash the server.

Patch / fix

fixed in 1

MZ Automation libIEC61850 Commit: a3b04b7bc4872a5a39e5de3fdc5fbde52c09e10e

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-22-251-01 updated 2022-09-08 cvss 8.6

MZ Automation libIEC61850

MZ Automation GmbH libIEC61850 >= 1.5, <= a3b04b7bc4872a5a39e5de3fdc5fbde52c09e10e, <= 1.4
affected: vendor fix github.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 18 mo ago (2025-04-16)

Exploit prediction

1.08% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

MZ Automation libIEC61850

Classification

Weakness

CWE-476 NULL Pointer Dereference

References

cisa.gov /uscert/ics/advisories/icsa-22-251-01
third-party-advisory, us-government-resource

Sources

CVE List CVE-2022-2973
NVD CVE-2022-2973

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary