Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

cant access wikipedia.org due to security certificate error SEC_ERROR_UNKNOWN_ISSUER

Flap_Zappa
Flap_Zappa
more options

for the last few days I have not been able to access wikipedia.org due to security certificate error SEC_ERROR_UNKNOWN_ISSUER as wikipedia is a very mainstream site I am surprised they would have this issue. It affects firefox, chrome and MS Edge

for the last few days I have not been able to access wikipedia.org due to security certificate error SEC_ERROR_UNKNOWN_ISSUER as wikipedia is a very mainstream site I am surprised they would have this issue. It affects firefox, chrome and MS Edge
Attached screenshots

All Replies (2)

FredMcD
FredMcD
more options

How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.cdn.mozilla.net/media/uploads/images/thumbnails/2017-06-07-08-34-22-cb6da3.png

https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

Since all of your browsers are affected, it may be some external factor such as:

  • security software that filters your web connections
  • "parental control" software that filters your web connections
  • firewall software
  • ISP settings error
  • proxy server settings error
  • private VPN/Hola/TOR settings error