Php Version 5640 Vulnerabilities Verified -
PHP version 5.6.40 vulnerabilities — verified
Note: this post summarizes known vulnerability classes affecting PHP 5.6.40 and practical recommendations. PHP 5.6 reached end-of-life years ago and no longer receives security fixes; running it in production carries significant risk.
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memory management or input validation also affect PHP 5.6.40, but they remain "unverified" simply because the version is obsolete.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 php version 5640 vulnerabilities verified
PHP version 5.6.40, released in January 2019, served as the final security release for the PHP 5.6 branch PHP version 5
Integer Underflow (CVE-2016-10166): An integer underflow in the _gdContributionsAlloc function in gd_interpolation.c can be triggered by remote attackers to cause unspecified impacts through the decrementing of variables. Critical Risk Factors Sessions:
PHP version 5
Zero Security Support: No new patches are being released by the Official PHP Development Team.
Target for Automated Attacks: Because many legacy systems still run PHP 5.6, it is a high-priority target for automated exploit kits and unauthenticated SQL injection attacks.