Individual skill
pentesting-telnet
Testing Telnet services (default port 23) for cleartext credential capture, default/weak and hard-coded credentials, NTLM info disclosure, option negotiation issues, and code-execution/DoS CVEs (inetutils telnetd NEW_ENVIRON option injection CVE-2026-24061, D-Link CVE-2024-45698, NETGEAR CVE-2023-40478, inetutils DoS CVE-2022-39028) during authorized engagements.
internal/tools/skills/data/network-services-pentesting/pentesting-telnet/SKILL.md
Source commit d42f381ad34843e71a42658e5c57290c713e85af
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 9, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
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Repository context
- Repository stars (not skill ratings)
- 1,325
- Repository last updated
- Nov 9, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- cybersecurity Repository topic
- security Repository topic
- bug-bounty Repository topic
- automation Repository topic
- autonomous-pentesting Repository topic
- ai-agent Repository topic
- ai-security Repository topic
- ethical-hacking Repository topic
- golang Repository topic
- penetration-testing Repository topic
- penetration-testing Declared skill tag
- network-services Declared skill tag
- telnet Declared skill tag
- testing Derived category
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# Pentesting Telnet (port 23)
## When to Use
- Default port `23/tcp` (some appliances expose alternates). Telnet is an **unencrypted** remote-access protocol.
- When `nmap`/banner shows `telnet`, a `telnetd` daemon, or a login prompt over port 23.
- Very common on IoT, routers, switches, VoIP, and legacy UNIX — a prime target for default-credential and cleartext-sniffing attacks.
## Quick Enumeration
```bash
# Banner grab
nc -vn <IP> 23
# Safe scripted enumeration
nmap -n -sV -Pn --script "*telnet* and safe" -p 23 <IP>