CVE-2021-36764 is a NULL Pointer Dereference vulnerability affecting CODESYS Gateway V3 versions prior to 3.5.17.10. This flaw allows an unauthenticated attacker to trigger a denial-of-service condition by sending specially crafted communication requests. With a CVSS score of 7.5 (High), it presents a significant availability risk due to its network-based attack vector and low attack complexity. While there is no known active exploitation, public exploit code, or KEV listing, the vulnerability has garnered some community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.0, < 3.5.17.10CPE matchmatch criteria | cpe:2.3:a:codesys:gateway:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.