SSA-967325

Siemens Security Advisory by Siemens ProductCERT

SSA-967325: Buffer Overflow Vulnerability in Palo Alto Networks PAN-OS on RUGGEDCOM APE1808 Devices

Publication Date:	2026-05-12
Last Update:	2026-05-12
Current Version:	V1.0
CVSS v3.1 Base Score:	10.0
CVSS v4.0 Base Score:	9.3

SUMMARY

A buffer overflow vulnerability in the User-ID™ Authentication Portal (aka Captive Portal) service of Palo Alto Networks PAN-OS software allows an unauthenticated attacker to execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls by sending specially crafted packets.

Siemens is preparing fix versions and recommends countermeasures for products where fixes are not, or not yet available. Customers are advised to consult and implement the workarounds provided in Palo Alto Networks' upstream security notifications.

1 https://security.paloaltonetworks.com/

KNOWN AFFECTED PRODUCTS

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Affected Product and Versions	Remediation
RUGGEDCOM APE1808 All versions with Palo Alto Networks Virtual NGFW with User-ID™ Authentication Portal configured and interface management profile with response pages enabled affected by CVE-2026-0300	Contact customer support to receive patch and update information See further recommendations from section Mitigations

MITIGATIONS

Siemens has identified the following specific mitigations that customers can apply to reduce the risk:

Disable User-ID™ Authentication Portal if not required
Disable Response Pages in the Interface Management Profile attached to every L3 interface in any zone where untrusted/internet traffic can ingress. Keep Response Pages enabled only on interfaces in trust/internal zones where legitimate users' browsers ingress
Restrict access to the User-ID Authentication Portal to trusted internal IP addresses only

Product-specific remediations or mitigations can be found in the section Known Affected Products.
Please follow the General Security Recommendations.

GENERAL SECURITY RECOMMENDATIONS

As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity

PRODUCT DESCRIPTION

RUGGEDCOM APE1808 is a powerful utility-grade application hosting platform that lets you deploy a range of commercially available applications for edge computing and cybersecurity in harsh, industrial environments.

VULNERABILITY DESCRIPTION

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This chapter describes all vulnerabilities (CVE-IDs) addressed in this security advisory. Wherever applicable, it also documents the product-specific impact of the individual vulnerabilities.

Vulnerability CVE-2026-0300

CVSS v3.1 Base Score	10.0
CVSS v3.1 Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0 Base Score	9.3
CVSS v4.0 Vector	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N
CWE	CWE-787: Out-of-bounds Write

ADDITIONAL INFORMATION

For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories

HISTORY DATA

V1.0 (2026-05-12):

Publication Date

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