Contacting AVG about (probably) false positive and submitting file

I went to the page in that link and submitted the file. It looked like it worked; the page reported a successful submission of the file. Hopefully that will help.

Hello, W S.
I am sorry for the delay. The issue with .TIFF files should be fixed now. We would also request you to update your Adobe Reader to latest version.

Hello WS,
I understand your concern and I also read your previous chat conversation. Please follow this article instruction to submit a sample. Once you submit the sample, it will reach to our concern team.
Best regards,
Alok.

The whitelisting service says it's for software developers. I'm not a software developer. These are just files on my system that are abruptly throwing up positives. Is that going to cause any issues?

For what it's worth, the "send us a sample" page is still not working, over 24 hours and one full working day later.

Is there ANY OTHER WAY, besides the "Send us a sample" page at False Positive File Form to submit a sample file for AVG to analyze? An email address or an SFTP server or anything?

Today, during a scheduled scan, AVG detected TIFF:CVE-2018-4903 [Expl] in several files on my system. Since they've almost all been there for more than a year, and been scanned weekly the entire time, it seems wildly unlikely that there's anything wrong with them. AVG Support chat asked me to upload to the chat itself, but that didn't work; they then asked me to use the "Send us a sample" page to get it a file to their developers for analysis. I tried using the page as directed but every time I try, I get a nonspecific HTTP Error 500 message from the AVG server. This has been going on for quite some time now. 

Is there ANY OTHER WAY to submit a sample? An email address or an SFTP server or anything? It would be nice not to have to go through this every time the scheduled scan runs.

Wendall,

It will not cause any issues. You can submit the file directly from this website- https://www.avg.com/en-us/whitelist-program-application

Hello, W S.
I am sorry for the delay. The issue with .TIFF files should be fixed now. We would also request you to update your Adobe Reader to latest version.

Wendall,
Thank you for confirming it. Our developers will check it and white list the file from AVG virus definitions.

To clarify: AVG Internet Security flagged 58 TIFFs as being affected by the exploit. I uploaded just one as a sample. I can upload others, I guess, but not all 58 of them!

Ah. OK, I think I misunderstood. It's not just one file; it was 58 of them. They're all large TIFFs, so even compressed, I couldn't upload them all.

I'm not sure how to proceed at this point.

I went to the page in that link and submitted the file. It looked like it worked; the page reported a successful submission of the file. Hopefully that will help.

Hello WS,
I understand your concern and I also read your previous chat conversation. Please follow this article instruction to submit a sample. Once you submit the sample, it will reach to our concern team.
Best regards,
Alok.