CVE-2016-4542: The exif_process_IFD_TAG function in ext/exif/exif.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x bef...

Security readout for executives and security teams

CVE-2016-4542 is a PHP EXIF parsing flaw. A specially crafted image header could make vulnerable PHP versions read outside expected memory and crash the process. The public record says denial of service is the clear risk; other impact is only described as possible and unspecified. Exposure is most likely where legacy PHP applications process user-supplied images or metadata with the EXIF extension on affected PHP branches. Systems using distribution PHP packages should map their installed package versions to the linked vendor advisories. Address during normal vulnerability remediation, faster for public image-processing services. The main documented business risk is service disruption, not confirmed data theft or code execution, but legacy PHP exposure often indicates broader operational debt. Mitigation focus: Upgrade PHP to 5.5.35, 5.6.21, 7.0.6, or later fixed versions.; Apply fixed PHP packages from your Linux or appliance vendor advisory.; Prioritize internet-facing image upload or metadata processing services..

Prepared

Jun 13, 2026, 14:22 UTC (UTC+00:00)

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