CVE-2020-20486

Name: CVE-2020-20486
Creator: NVD / NIST
Published: 2021-08-31T23:15:06.78+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.09%

Last modified Jun 17, 2026

CVE-2020-20486 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. IEC104 v1.0 contains a stack-buffer overflow in the parameter Iec10x_Sta_Addr.. EPSS estimates a 1.09% chance of exploitation in the next 30 days.

Description

IEC104 v1.0 contains a stack-buffer overflow in the parameter Iec10x_Sta_Addr.

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

1.09%

61.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Iec104 Project	Iec104	1.0

References

https://github.com/airpig2011/IEC104/issues/14Exploit, Third Party Advisory
https://github.com/airpig2011/IEC104/issues/14Exploit, Third Party Advisory

Timeline

Published: Aug 31, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-20486?

IEC104 v1.0 contains a stack-buffer overflow in the parameter Iec10x_Sta_Addr.

How severe is CVE-2020-20486?

CVE-2020-20486 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.09% probability of exploitation in the next 30 days.

How do I fix CVE-2020-20486?

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-2020-20486?

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

Scan your code now

Source: NVD / NIST