Cisco’s TACACS+ Trouble: Is Your Device Vulnerable to the Missing Shared Secret Glitch?
Cisco devices running vulnerable IOS and IOS XE Software without a configured TACACS+ shared secret are affected by this vulnerability. Check your device’s configuration using CLI commands to ensure every TACACS+ server is secured with a shared key. Otherwise, your network security might be as solid as a wet paper bag.

Hot Take:
Looks like Cisco’s been caught with their pants down again, and their TACACS+ shared secret isn’t really a secret anymore. Who knew that forgetting to lock the back door could be such a security faux pas?
Key Points:
- Vulnerability affects Cisco devices running specific releases of IOS and IOS XE Software.
- Problem arises when devices use TACACS+ without a shared secret.
- Checking device vulnerability requires CLI commands to inspect TACACS+ configuration.
- Affected devices have TACACS+ servers without a shared key configured.
- Unaffected devices have all configured TACACS+ servers with shared secrets.
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