Google’s Chrome 139: Bye-Bye Trust for Chunghwa Telecom and Netlock Certificates!
Google says bye-bye to Chunghwa Telecom and Netlock! Chrome 139 won’t trust their digital certificates after July 31, 2025. Website operators, check your TLS certificates before Chrome users start seeing “potential security threat” warnings. It’s all about keeping Chrome users safe, so make sure your certificates are up to date!

Hot Take:
Looks like Chunghwa Telecom and Netlock got themselves a one-way ticket to the “no trust” zone. Google’s Chrome is taking a page out of a reality TV show and telling these Certificate Authorities, “Sorry, you didn’t get a rose.” It’s a real-life episode of “Who Wants to Be a Trusted CA?” and these two just got voted off the island.
Key Points:
- Google Chrome 139 will stop trusting certificates from Chunghwa Telecom and Netlock starting August 1, 2025.
- The decision stems from concerning behavior and non-compliance by the two CAs.
- Certificates issued before August 1, 2025, remain unaffected.
- Website operators must check and replace affected certificates to avoid security warnings.
- Chrome users can manually override the constraints by installing root CA certificates locally.
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