Erroneous WiFi Vulnerability CVE-2012-5958 ?

I have Avast Free Antivirus version 17.8.2318 (build 17.8.3705.0) installed and ran WiFi Inspector for the first time.
This resulted in a CVE-2012-5958 warning.
I have checked and confirmed with my ISP that my ZTE Router has the latest firmware. I am also advised that this security issue was known and has been fixed since 2014.

I Note from other posts that others have queried the CVE-2012-5958 warning.

I’d like confirmation that my WiFi security is safe. Can anyone clarify this?

Below is the response I got fro my ISP (Hyperoptic).

Quote
From: Stefan Micevski (Hyperoptic)

Nov 16, 12:54 GMT

Dear John,

Thank you for your patience while we investigated this.

We have an email confirmation from ZTE production line that this security issue has been fixed since August 2014. ZTE routers with the current firmware version that we are using on our network aren’t affected by this issue since 2014.

Should you require any further assistance, please do not hesitate to give us a call on 0333 332 1111.

Kind Regards,
Stefan Micevski

Customer Support Senior Agent

ENDQUOTE