CVE-2022-21159

Name: CVE-2022-21159
Creator: NVD / NIST
Published: 2022-04-15T16:15:07.72+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.75%

Last modified Jun 17, 2026

CVE-2022-21159 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.75% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.75%

74.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mz-Automation	Libiec61850	1.5.0

References

https://github.com/mz-automation/libiec61850/commit/cfa94cbf10302bedc779703f874ee2e8387a0721Patch, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2022-1467Exploit, Third Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2022-1467Exploit, Third Party Advisory
https://github.com/mz-automation/libiec61850/commit/cfa94cbf10302bedc779703f874ee2e8387a0721Patch, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2022-1467Exploit, Third Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2022-1467Exploit, Third Party Advisory

Timeline

Published: Apr 15, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-21159?

How severe is CVE-2022-21159?

CVE-2022-21159 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.75% probability of exploitation in the next 30 days.

How do I fix CVE-2022-21159?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-21159?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST