CVE-2021-40523 is a denial-of-service vulnerability affecting Contiki 3.0, specifically within its Telnet option negotiation. An attacker can exploit improper handling of exception conditions during negotiation, causing the server to fail to respond to WILL/DO commands and potentially exhaust a fixed buffer space. This vulnerability carries a high CVSS score of 7.5, indicating a network-based attack with low complexity leading to high availability impact. There is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
3.0CPE matchmatch criteria | cpe:2.3:o:contiki-os:contiki:3.0:*:*:*:*:*:*:* |
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.