CVE-2021-27478

7.5 highEPSS 1.2%

High (7.5) in opener project opener. EPSS 1.2% chance of exploitation in the next 30 days.

A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may cause a denial-of-service condition.

Severity

CVSS 3.1

7.5 high

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

EPSS: 1.2% chance of exploitation in the next 30 days; higher than 67% of CVEs (scores of 2026-10-31)
CWE: CWE-681
Published: 2022-05-12
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

opener_project:opener

References

https://github.com/EIPStackGroup/OpENer
https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02
https://github.com/EIPStackGroup/OpENer
https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02

Check your stack JSON