What is CVE-2021-45769?

CVE-2021-45769 is a high-severity vulnerability in Mz-Automation Libiec61850, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2022-01-14.

How severe is CVE-2021-45769?

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

NULL pointer dereference in Mz-Automation Libiec61850

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.

Published 2022-01-14 · 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: 0.011 (63.3th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Mz-Automation Libiec61850 — versions 1.5.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

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

Frequently asked questions

What is CVE-2021-45769?: CVE-2021-45769 is a high-severity vulnerability in Mz-Automation Libiec61850, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2022-01-14.
How severe is CVE-2021-45769?: High severity. CVSS v3 base score is 7.5 out of 10.