# SNMP Weak Community String

> Detects SNMP configurations using default or weak community strings that allow unauthorized network device management.

- Skill: `zakirkun/snmp-weak-community-string` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add zakirkun/snmp-weak-community-string`
- Raw SKILL.md: https://api.skillmd.com/api/skills/zakirkun/snmp-weak-community-string/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: zakirkun (https://skillmd.com/u/zakirkun)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/zakirkun/snmp-weak-community-string

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# SNMP Weak Community String

## Overview
SNMP (Simple Network Management Protocol) uses community strings as authentication for v1 and v2c. Default strings `public` (read) and `private` (write) are universally known and allow:
- Reading entire MIB (network topology, device info, traffic stats)
- Writing to network configuration (v2c write access)
- Gaining network intelligence for lateral movement

## Remediation
- Use SNMPv3 with authentication and encryption
- If v2c required, use strong random community strings
- Block SNMP from external interfaces
- Apply ACLs to restrict SNMP access to management stations