What’s Vulnerable › Vulnerabilities

CVE-2021-42705: WECON PLC Editor

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-22 · updated 2026-06-17
• Weakness: CWE-121

Description

PLC Editor Versions 1.3.8 and prior is vulnerable to a stack-based buffer overflow while processing project files, which may allow an attacker to execute arbitrary code.

Affected products

• WECON PLC Editor: through 1.3.8

References

• https://us-cert.cisa.gov/ics/advisories/icsa-21-315-01
• https://us-cert.cisa.gov/ics/advisories/icsa-21-315-01

Get alerted when CVE-2021-42705 or the next vulnerability affects your stack