CVE-2020-7054

Name: CVE-2020-7054
Creator: NVD / NIST
Published: 2020-01-14T21:15:16.707+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.10%

Last modified Jun 17, 2026

CVE-2020-7054 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 1.10% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.10%

61.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Mz-Automation	Libiec61850	<= 1.4.0

References

https://github.com/mz-automation/libiec61850/issues/200Exploit, Third Party Advisory
https://github.com/mz-automation/libiec61850/issues/200Exploit, Third Party Advisory

Timeline

Published: Jan 14, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is 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.

How severe is CVE-2020-7054?

CVE-2020-7054 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.10% probability of exploitation in the next 30 days.

How do I fix CVE-2020-7054?

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-2020-7054?

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

Scan your code now

Source: NVD / NIST