Vulnerabilities in PHP Affecting Cisco Products: October 2026

On October 21, the PHP Foundation announced the availability of a Critical PHP Security release addressing two critical vulnerabilities: CVE-2026-109618 - RCE via OOM corruption CVE-2026-109619 - RCE via stale global state For information about these vulnerabilities, see the advisories GHSA-w8hw-w9fx-j79w and GHSA-6wmf-4rv5-p3rp. These vulnerabilities are being referenced as PHP2shell. For information about Splunk products and offerings, see Vulnerabilities in PHP (CVE-2026-109618, CVE-2026-109619) on Splunk Products - October 2026. Important: If a product is not listed within this advisory, Cisco's review indicates that the product is not affected by this vulnerability. This advisory will be updated as additional information becomes available. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-php-october26-Jj384Daq