CVE-2021-21777 is a critical information disclosure vulnerability affecting the EIP Stack Group OpENer 2.3 and development commit 8c73bf3, specifically within its Ethernet/IP UDP handler. This flaw allows an unauthenticated attacker to trigger an out-of-bounds read via a specially crafted network request, leading to potential compromise of confidentiality and availability. With a CVSS score of 10.0, it is easily exploitable over the network with low attack complexity. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
2.3CPE matchmatch criteria | cpe:2.3:a:opener_project:opener:2.3:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.