Vulnerabilities in PHP Affecting Cisco Products: October 2026

cisco-sa-php-october26-Jj384Daq · Cisco · October 21, 2026

Summary

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 ["https://github.com/php/php-src/security/advisories/GHSA-w8hw-w9fx-j79w"] and GHSA-6wmf-4rv5-p3rp ["https://github.com/php/php-src/security/advisories/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 ["https://advisory.splunk.com/advisories/SVD-2026-1013"]. 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.

From Cisco (vendor's own words, quoted), quoted as published. Check the source before acting.

Each CVE in this advisory

CVE	Severity	Known exploited	Exploit likelihood	Weakness
CVE-2026-109618	Not scored	Exploited	100.0%	—
CVE-2026-109619	Not scored	Exploited	100.0%	—

Severity from the advisory (CVSS), known exploitation from CISA's catalog, exploit likelihood from EPSS (next 30 days).

Why it's on these mode pages

Maritime: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
Pipeline: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
Freight rail: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
Passenger rail and transit: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
Highway and motor carrier: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
Postal and parcel: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)

Change history

October 21, 2026: Initial public release.
October 22, 2026: Updated vulnerable products and products confirmed not vulnerable.
October 22, 2026: Updated products under investigation and products confirmed not vulnerable.
October 22, 2026: Added the Splunk advisory link. Updated products under investigation, vulnerable products, and products confirmed not vulnerable.
October 22, 2026: Updated products under investigation and products confirmed not vulnerable.
October 23, 2026: Updated products under investigation and products confirmed not vulnerable. Added a statement to explain that any product not listed in this advisory is considered not affected by this vulnerability.
October 23, 2026: Updated to indicate that workarounds are available. Updated products under investigation and products confirmed not vulnerable.
October 26, 2026: Updated products under investigation and products confirmed not vulnerable. Updated fixed release information.
October 27, 2026: Updated vulnerable products and products confirmed not vulnerable.
October 28, 2026: Update fix availability date for Ultra-Reliable Wireless Backhaul (URWB) and Unified Industrial Wireless Software.
October 30, 2026: Updated fix status for ISE Portal Builder and fixed release for Ultra-Reliable Wireless Backhaul (URWB) and Unified Industrial Wireless Software. Added Webex Events to products confirmed not vulnerable.
November 6, 2026: Updated Ultra-Reliable Wireless Backhaul (URWB) and Unified Industrial Wireless Software as being available.
November 9, 2026: First collected by Watch

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