Using ciscoNEW results in error because of uninitialized variable

[vKnmnn]

Use of uninitialized value $CiscoThreshold_severity2 in numeric eq (==) at nagios/libexec/check_snmp_environment.pl.bak line 2465.

[DarkNinja77]

had the same problem and fixed it for Nagios 4.4.x. Check out my version of this plugin:
https://github.com/DarkNinja77/check_snmp_environment.pl