CVE-2020-27631 describes a critical vulnerability in Oryx CycloneTCP 1.9.6, where TCP Initial Sequence Numbers (ISNs) are improperly randomized, affecting embedded systems utilizing this TCP/IP stack. This flaw carries a CVSS score of 9.8 (Critical), indicating it can be exploited remotely with low complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation, public exploit code, or KEV listing, the vulnerability has garnered some community discussion and media attention, highlighting its potential for TCP connection hijacking and spoofing.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.9.6CPE matchmatch criteria | cpe:2.3:a:oryx-embedded:cyclonetcp:1.9.6:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.
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.