What’s Vulnerable › Vulnerabilities

CVE-2020-13556

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-12-11 · updated 2026-06-17
• Weakness: CWE-787

Description

An out-of-bounds write vulnerability exists in the Ethernet/IP server functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3. A specially crafted series of network requests can lead to remote code execution. An attacker can send a sequence of requests to trigger this vulnerability.

Affected products

• EIPStackGroup OpENer EtherNet/IP: 2.3

References

• https://talosintelligence.com/vulnerability_reports/TALOS-2020-1170
• https://talosintelligence.com/vulnerability_reports/TALOS-2020-1170

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