CVE-2021-1590 describes a denial-of-service vulnerability in Cisco NX-OS Software, specifically within the implementation of the system login block-for command. An unauthenticated, remote attacker can exploit a logic error by performing a brute-force login attempt, causing the login process to restart and potentially delaying authentication. This vulnerability has a CVSS score of 5.3 (Medium), indicating a low attack complexity and no impact on confidentiality or integrity, only availability. There is 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 |
|---|---|---|---|
7.0\(3\)i4\(0.116\)CPE matchmatch criteria | cpe:2.3:o:cisco:nx-os:7.0\(3\)i4\(0.116\):*:*:*:*:*:*:* | ||
7.3\(7\)n1\(1b\)CPE matchmatch criteria | cpe:2.3:o:cisco:nx-os:7.3\(7\)n1\(1b\):*:*:*:*:*:*:* | ||
< 4.0\(4m\)CPE matchmatch criteria | cpe:2.3:o:cisco:unified_computing_system:*:*:*:*:*:*:*:* | ||
>= 4.1, < 4.1\(3d\)CPE matchmatch criteria | cpe:2.3:o:cisco:unified_computing_system:*:*:*:*:*:*:*:* |
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:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.