CVE-2021-27500

HIGH 7.5CVE-2021-27500 · Published 12/05/2022 · updated 17/06/2026

In short

CVE-2021-27500 is a HIGH (CVSS 7.5) vulnerability affecting opener (opener project).
Chance of exploitation in the next 30 days (EPSS): 1.3%, higher than 71.4% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
opener opener_project	`≤ 2.3`	No fix yet

Description

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

References

EIPStackGroup/OpENer · Third Party Advisory
cisa.gov/uscert/ics/advisories/icsa-21-105-02 · Third Party Advisory

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Package

Affected versions

Patched versions

opener

opener_project

≤ 2.3

No fix yet

More vulnerabilities in opener

See all →