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CVE-2021-27482

24
FAUCET Score

CVE-2021-27482 is a high-severity vulnerability affecting EIPStackGroup OpENer EtherNet/IP commits and versions prior to February 10, 2021. An unauthenticated attacker can exploit this flaw remotely by sending a specially crafted packet, leading to arbitrary data disclosure. While no public exploits or active exploitation have been observed, the vulnerability has garnered some community discussion and media coverage, indicating a level of awareness within the cybersecurity community. Organizations using affected OpENer versions should prioritize patching to mitigate the risk of information compromise.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.3CPE matchmatch criteria
cpe:2.3:a:opener_project:opener:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.23%
Probability of exploitation in next 30 days
EPSS Percentile
65.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0123 is in the 45th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / EIPStackGroup/OpENer
Third Party Advisory
cisa.gov / uscert/ics/advisories/icsa-21-105-02
Third Party AdvisoryUS Government Resource