Then deploy with – only via a secure jump host.
The following verified vulnerabilities were addressed in the PHP 5.6.40 release to encourage users to upgrade from previous 5.6.x versions: php version 5640 vulnerabilities verified
PHP 5.6.40 served the web well from 2014 to 2019. But in 2026, it is a digital ruin. Every day you run it, you are betting that no attacker has yet run a simple Shodan search against your IP range. That is a losing bet. Then deploy with – only via a secure jump host
Version 5.6.40 was designed to be the most stable version of PHP 5, but its age now makes it a prime target for automated scanning tools. PHP 5.6.40 Release Announcement Every day you run it, you are betting
Because PHP 5.6.40 is no longer actively monitored by the community, many vulnerabilities discovered in newer versions (like PHP 7.x or 8.x) are never back-tested against 5.6.40. There is a high probability that modern exploits targeting memory management or input validation also affect PHP 5.6.40, but they remain "unverified" simply because the version is obsolete. Unsupported Branches - PHP