CVE-2012-0830: The php_register_variable_ex function in php_variables.c in PHP 5.3.9 allows remote attackers to execute ar...

Security readout for executives and security teams

CVE-2012-0830 is a PHP 5.3.9 flaw where a malformed web request with many variables could lead to arbitrary code execution. For an executive, the concern is legacy internet-facing PHP: a vulnerable runtime can turn a normal web request into server compromise. The bundle does not show active exploitation. Most likely exposure is legacy web applications running PHP 5.3.9, or downstream OS/vendor packages that incorporated the faulty HashDoS fix. Red Hat, Debian, SUSE/openSUSE, and HP advisories indicate distribution-level exposure. The provided data does not prove broader PHP version impact beyond the cited affected runtime and vendor packages. Prioritize remediation for any internet-facing legacy PHP service. This is an old issue, but remote code execution in a web runtime has high business impact if the vulnerable version remains deployed. Systems already upgraded beyond the affected vendor guidance are lower priority. Mitigation focus: Identify systems running PHP 5.3.9 or affected vendor PHP packages.; Apply the relevant vendor advisory update or PHP 5.3.10-era fix.; Retire unsupported PHP 5.3 deployments where possible..

Prepared

Jun 27, 2026, 17:28 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.