7181 likely refers to ASA software version 7.18(1), and 152 is a build number.
. This specific release introduced critical security enhancements, most notably mandatory digital signature validation asdm-7181-152.bin
Extract file listing for structural comparison: 7181 likely refers to ASA software version 7
Verify that the file has transferred completely by inspecting the flash directory: ciscoasa# dir flash: Use code with caution. Step 3: Updating the Boot Configuration asdm-7181-152.bin
: ASDM 7.18 no longer supports Java Web Start. Users must install the standalone ASDM Launcher to access the interface. It is compatible with Oracle JRE 8.0 or OpenJRE 1.8.x. Backward Compatibility