CVE-2007-1649: PHP 5.2.1 allows context-dependent attackers to read portions of heap memory by executing certain scripts w...

Security readout for executives and security teams

CVE-2007-1649 is an information disclosure issue in PHP 5.2.1. Under specific script and input conditions, an attacker could cause PHP to expose portions of heap memory. The business risk depends on whether legacy PHP 5.2.1 is still running and whether applications process attacker-controlled serialized data. Exposure is most likely in legacy environments still running PHP 5.2.1, especially applications that accept or process serialized input strings supplied by users or integrations. Treat this as a legacy-risk cleanup item unless PHP 5.2.1 is internet-facing or handles untrusted serialized input. Prioritize discovery and upgrade planning over emergency response because active exploitation is not supported by the provided sources. Mitigation focus: Inventory systems for PHP 5.2.1 or vendor packages derived from it.; Review PHP 5.2.2 release notes and distribution advisories for applicable fixes.; Upgrade legacy PHP runtimes using vendor-supported packages where feasible..

Prepared

Jun 29, 2026, 06:37 UTC (UTC+00:00)

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