What is CVE-2020-7054?

CVE-2020-7054 is a high-severity vulnerability in Mz-Automation Libiec61850, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2020-01-14.

How severe is CVE-2020-7054?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Mz-Automation Libiec61850

CVE-2020-7054

MmsValue_decodeMmsData in mms/iso_mms/server/mms_access_result.c in libIEC61850 through 1.4.0 has a heap-based buffer overflow when parsing the MMS_BIT_STRING data type.

Vulnerability class: Buffer Overflow

Published 2020-01-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.4% 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

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/mz-automation/libiec61850/issues/200 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-7054?: CVE-2020-7054 is a high-severity vulnerability in Mz-Automation Libiec61850, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2020-01-14.
How severe is CVE-2020-7054?: High severity. CVSS v3 base score is 8.8 out of 10.