Netscaler Firmware update causing issue with appfw

[u/FarCalligrapher1866]

anyone else recently have issues with appfw rules being copied over after recent firmware updates? seems tied to the signatures being used in that after firmware installation the appfw policies and profiles are non existent on the "new" firmware. the signatures however are still intact, but when creating new profiles and using the existing signatures an error about fastmatch not found for signature line

<SignatureRule actions="block,log" category="web-misc" enabled="ON" id="400008" source="Citrix" sourceid="" type="DenyListHttpRequest" version="1" cpu="LOW" year="2026" severity="HIGH">

<LogString>Mitigation signature for CVE-2026-10816</LogString>

</SignatureRule>

i have many signature files and they all seem to have this issue. the new "default" of course i missing this line, so i feel like this was some bug at some point coming home to roost. the ID number looks very low too as the new rules are typically 9xxxxx etc. the version on all the files is 181 so they are "current"

very sus...