CVE-2020-27633 describes an improper randomization of TCP Initial Sequence Numbers (ISNs) in FNET 4.6.3, affecting butok fnet products. This critical vulnerability, with a CVSS score of 9.1, allows unauthenticated attackers to remotely hijack TCP connections and spoof communications with low attack complexity, leading to high confidentiality and integrity impacts. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion, though it has received limited media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
4.6.3CPE matchmatch criteria | cpe:2.3:a:butok:fnet:4.6.3:*:*:*:*:*:*:* |
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:N
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.