Cracked scanners often freeze plugin updates. You might scan a network, see "0 Critical findings," and assume you are secure—when in fact, Log4j or a new zero-day is present. This false sense of security is more dangerous than having no scanner at all.
Tenable provides official support for running Nessus within Docker. This deployment method is favored for:
: Methods to reset the scanner's state to maintain "Professional" features without a valid activation code. 3. Professional Risks and "Work" Implications