CVE-2020-25177: WECON PLC Editor Versions 1.3.8 and prior has a stack-based buffer overflow vulnerability has been identified

Q: How do I fix CVE-2020-25177?

plc editor: upgrade to newer than 1.3.8. Exact commands for each OS are on this page.

Q: Is CVE-2020-25177 being exploited?

CVE-2020-25177 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-25177 affect?

CVE-2020-25177 affects plc editor. Severity is high (CVSS 8.8). WECON PLC Editor Versions 1.3.8 and prior has a stack-based buffer overflow vulnerability has been identified that may allow arbitrary code execution.

This month

HIGH 8.8UPGRADE

CVE-2020-25177 is a high-severity flaw (CVSS 8.8) affecting plc editor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WECON PLC Editor Versions 1.3.8 and prior has a stack-based buffer overflow vulnerability has been identified that may allow arbitrary code execution.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-121, CWE-787
Published	2020-12-01
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: we-con

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-12-01 15:15 UTCPublished CVE record published
2026-06-17 03:06 UTCUpdated Record last modified

we-con plc editor UPGRADE

Affected: <= 1.3.8

Fixed in: newer than 1.3.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy plc-editor || rpm -q plc-editor || plc-editor --version

2. UPGRADE to newer than 1.3.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade plc-editor

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade plc-editor

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-25177?

plc editor: upgrade to newer than 1.3.8. Exact commands for each OS are on this page.

Is CVE-2020-25177 being exploited?

CVE-2020-25177 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-25177 affect?

CVE-2020-25177 affects plc editor. Severity is high (CVSS 8.8). WECON PLC Editor Versions 1.3.8 and prior has a stack-based buffer overflow vulnerability has been identified that may allow arbitrary code execution.

How urgent is CVE-2020-25177?

Priority 50/100. High severity

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CVE-2021-42705 HIGH 7.8 UPGRADE PLC Editor Versions 1.3.8 and prior is vulnerable to a stack-based buffer overflow while processing project fi
CVE-2020-25181 HIGH 8.8 UPGRADE WECON PLC Editor Versions 1.3.8 and prior has a heap-based buffer overflow vulnerabilities have been identifie

References

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