CVE-2020-22552 describes a denial-of-service vulnerability affecting the Snap7 server component, specifically version 1.4.1. An unauthenticated attacker can crash the server by sending a specially crafted COTP packet with the last-data-unit flag set to No and utilizing the S7 write var function. This vulnerability carries a high severity CVSS score of 7.5, indicating a network-based attack with low complexity and a high impact on availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.4.1CPE matchmatch criteria | cpe:2.3:a:snap7_project:snap7:1.4.1:*:*:*:*:*:*:* |
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.
No media coverage found for this CVE.
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.