CVE-2021-45769

Name: CVE-2021-45769
Creator: NVD / NIST
Published: 2022-01-14T20:15:15.063+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.06%

Last modified Jun 17, 2026

CVE-2021-45769 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A NULL pointer dereference in AcseConnection_parseMessage at src/mms/iso_acse/acse.c of libiec61850 v1.5.0 can lead to a segmentation fault or application crash.. EPSS estimates a 1.06% chance of exploitation in the next 30 days.

Description

A NULL pointer dereference in AcseConnection_parseMessage at src/mms/iso_acse/acse.c of libiec61850 v1.5.0 can lead to a segmentation fault or application crash.

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

1.06%

60.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Mz-Automation	Libiec61850	1.5.0

References

https://github.com/mz-automation/libiec61850/issues/368Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/mz-automation/libiec61850/issues/368Exploit, Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Jan 14, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45769?

A NULL pointer dereference in AcseConnection_parseMessage at src/mms/iso_acse/acse.c of libiec61850 v1.5.0 can lead to a segmentation fault or application crash.

How severe is CVE-2021-45769?

CVE-2021-45769 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.06% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45769?

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-2021-45769?

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

Scan your code now

Source: NVD / NIST