CVE-2016-9934: ext/wddx/wddx.c in PHP before 5.6.28 and 7.x before 7.0.13 allows remote attackers to cause a denial of ser...

Security readout for executives and security teams

This PHP flaw can let a remote attacker crash affected PHP processing by sending specially crafted WDDX XML data. The cited sources describe denial of service, not data theft or code execution. Business urgency depends on whether legacy PHP systems still accept untrusted WDDX input. Exposure is most likely in legacy PHP 5.6 or 7.0 deployments that parse untrusted WDDX XML. Systems not using WDDX handling, or already upgraded beyond the fixed PHP releases, are less likely to be affected. Treat this as a legacy-platform availability risk. It is not evidenced as actively exploited or code execution, but exposed unsupported PHP services should be upgraded because availability bugs compound broader maintenance risk. Mitigation focus: Upgrade PHP to at least 5.6.28 or 7.0.13 where applicable.; Prefer migration to a currently supported PHP branch.; Apply relevant distribution updates from vendors such as openSUSE or Red Hat..

Prepared

Jun 13, 2026, 12:51 UTC (UTC+00:00)

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