CAC Card Not Working: 15 Fixes That Work
Why Your CAC Card Stopped Working (And How to Fix It Fast) Your Common Access Card (CAC) is your gateway…
CAC Troubleshooting Center
Find solutions to common CAC reader issues, error codes, and setup problems
Quick Fixes
1
Restart Your Browser
Close all browser windows completely, then reopen and try again.
2
Reseat Your CAC
Remove your CAC card, wait 5 seconds, then reinsert it firmly.
3
Check USB Connection
Try a different USB port, preferably directly on your computer (not a hub).
4
Clear Browser Cache
Clear your browser's cache and cookies, then restart the browser.
Troubleshooting Guides
Error Codes
Solutions for specific error messages and codes
Reader Not Working
Fix hardware and connection problems
Certificate Issues
SSL, certificate selection, and authentication errors
Browser Setup
Configure Chrome, Firefox, Edge for CAC access
All Troubleshooting Articles
CAC Reader Not Working? Complete Troubleshooting Guide [SOLVED]
CAC Reader Not Working? Complete Troubleshooting Guide Having trouble with your CAC reader? You’re not alone. CAC reader issues are…
Error 53003: Solution Guide
Error Code: 53003 – Understanding the Problem Error codes serve as vital tools in troubleshooting problems in software applications and…
Error Code 53003: Fix Guide
Error Code 53003: Understanding and Troubleshooting Error codes can be confusing, especially when they interrupt tasks you expect to be…
How To Fix ERR_BAD_SSL_CLIENT_AUTH_CERT Error
Understanding the err_bad_ssl_client_auth_cert Error The digital world is teeming with security layers designed to protect data exchanges. One such layer…
Reinstall Safari 15 on Big Sur: An Easy Guide
Reinstall Safari 15 on macOS Big Sur Safari is Apple’s built-in web browser for macOS, providing a streamlined, fast browsing…
Resolving the ‘No Client Certificate’ Challenge
No Client Certificate Presented: Understanding the Essentials In today’s digital age, security is paramount. Ensuring secure, authenticated connections between users…
Frequently Asked Questions
Why isn't my CAC reader being recognized?
Common causes include: driver issues, USB port problems, or the reader not being properly connected. Try these steps:
- Unplug the reader and try a different USB port
- Check Device Manager (Windows) or System Information (Mac) to see if the reader appears
- Download and install the latest drivers from the manufacturer
- Restart your computer after driver installation
What does "No certificates found" mean?
This error typically means your browser can't detect the certificates on your CAC. Solutions include:
- Ensure your CAC is inserted correctly (chip facing up, contacts in)
- Install the DoD root certificates from militarycac.com
- Check that your middleware (like ActivClient) is properly installed
- Try clearing your browser cache and restarting
How do I fix SSL certificate errors?
SSL errors often occur when DoD certificates aren't properly installed. To fix:
- Download the DoD root CA certificates bundle
- Install them in your browser's certificate store
- For Chrome: Settings → Privacy → Security → Manage certificates
- For Firefox: Settings → Privacy & Security → View Certificates
Which CAC reader should I buy for home use?
For home use, we recommend USB contact readers that are TAA compliant. Popular options include:
- SCR3310v2 - Most widely compatible, works with all operating systems
- Identiv uTrust 2700 - Compact design, good for laptops
- HID Omnikey 3021 - Fast reading, durable build
Still Need Help?
Can't find a solution? Check our comprehensive guides or browse all CAC reader articles.