What is CVE-2022-21159?

CVE-2022-21159 is a high-severity vulnerability in Mz-Automation Libiec61850, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2022-04-15.

How severe is CVE-2022-21159?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Mz-Automation Libiec61850

CVE-2022-21159

A denial of service vulnerability exists in the parseNormalModeParameters functionality of MZ Automation GmbH libiec61850 1.5.0. A specially-crafted series of network requests can lead to denial of service. An attacker can send a sequence of malformed iec61850 messages to trigger this vulnerability.

Published 2022-04-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.018 (78.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: +0.000

Affected products

Mz-Automation Libiec61850 — versions 1.5.0
Mz Automation Gmbh Libiec61850 — versions 1.5.0

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

talosintelligence.com/vulnerability_reports/TALOS-2022-1467 (Exploit, Third Party Advisory)
github.com/mz-automation/libiec61850/commit/cfa94cbf10302bedc779703f874ee2e8387… (Patch, Third Party Advisory)
www.talosintelligence.com/vulnerability_reports/TALOS-2022-1467 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-21159?: CVE-2022-21159 is a high-severity vulnerability in Mz-Automation Libiec61850, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2022-04-15.
How severe is CVE-2022-21159?: High severity. CVSS v3 base score is 7.5 out of 10.