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CVE-2026-0266

PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface

A cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS® software enables a malicious authenticated administrator to store a JavaScript payload using the web interface. This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma® Access are not affected by this vulnerability.

CVSS 4.0 · 0.4 Low EPSS < 1% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks
Products
Cloud Ngfw Pan-os Prisma Access and 1 more
CVE-2026-0269

PAN-OS: Denial of Service (DoS) in Tunnel Traffic Processing

A memory corruption vulnerability in the processing of tunnel traffic in Palo Alto Networks PAN-OS® software allows an authenticated user to initiate system reboots using a maliciously crafted packet. Repeated attempts to initiate a reboot causes the firewall to enter maintenance mode. Panorama, Cloud NGFW, and Prisma® Access are not impacted by this vulnerability.

CVSS 4.0 · 4.6 Medium EPSS < 1% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks
Products
Cloud Ngfw Pan-os Panorama and 2 more
CVE-2026-0272

PAN-OS: Privilege Escalation (PE) Vulnerability in the Command Line Interface (CLI)

A privilege escalation vulnerability in Palo Alto Networks PAN-OS® software allows an authenticated administrator with access to the Command Line Interface (CLI) to perform actions on the device with root privileges. The security risk posed by this issue is significantly minimized when CLI access is restricted to a limited group of administrators and by restricting access to the management interface to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW, and Prisma® Access are not impacted by this vulnerability.

CVSS 4.0 · 5.6 Medium EPSS < 1% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks
Products
Cloud Ngfw Pan-os Prisma Access and 1 more
CVE-2026-0273

PAN-OS: Authenticated Admin Command Injection Vulnerability via CLI or Web UI

A command injection vulnerability in Palo Alto Networks PAN-OS® software enables an authenticated administrator to bypass system restrictions and run arbitrary commands as a root user. To be able to exploit this issue, the user must have access to the PAN-OS CLI or Web UI. The security risk posed by this issue is significantly minimized when CLI access is restricted to a limited group of administrators and by restricting access to the management web interface to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma® Access are not affected by this vulnerability.

CVSS 4.0 · 5.7 Medium EPSS 1.3% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks
Products
Cloud Ngfw Pan-os Prisma Access and 1 more
CVE-2026-0257

PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities

Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS® software allows the attacker to bypass security restrictions and establish an unauthorized VPN connection. Panorama and Cloud NGFW are not impacted by these issues.

CVSS 4.0 · 7.8 High EPSS 95.6% KEV · Listed
Vendors
Palo Alto Networks Paloaltonetworks Siemens
Products
Cloud Ngfw Pan-os Prisma Access and 4 more
CVE-2026-0265

PAN-OS: Authentication Bypass with Cloud Authentication Service (CAS) enabled

An authentication bypass vulnerability in Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to bypass authentication controls when Cloud Authentication Service (CAS) is enabled. The risk is higher if CAS is enabled on the management interface and lower when any other login interfaces are used. The risk of this issue is greatly reduced if you secure access to the management web interface by restricting access to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma Access® are not impacted by this vulnerability.

CVSS 4.0 · 2.7 Low EPSS 1.1% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks Siemens
Products
Cloud Ngfw Pan-os Prisma Access and 3 more
CVE-2026-0264

PAN-OS: Heap-Based Buffer Overflow in DNS Proxy and DNS Server Allows Unauthenticated Remote Code Execution

A buffer overflow vulnerability in the DNS proxy and DNS Server features of Palo Alto Networks PAN-OS® Software allows an unauthenticated attacker with network access to cause a denial of service (DoS) condition (all PAN-OS platforms except Cloud NGFW and Prisma Access) or potentially execute arbitrary code by sending specially crafted network traffic (PA-Series hardware only). Panorama, Cloud NGFW, and Prisma® Access are not impacted by this vulnerability.

CVSS 4.0 · 6.6 Medium EPSS < 1% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks Siemens
Products
Cloud Ngfw Pan-os Prisma Access and 3 more
CVE-2026-0262

PAN-OS: Denial of Service Vulnerabilities in Network Traffic Parsing

Multiple denial of service vulnerabilities in Palo Alto Networks PAN-OS® software allow an unauthenticated attacker with network access to cause a denial of service (DoS) condition by sending specially crafted network traffic. Panorama and Cloud NGFW are not impacted by these vulnerabilities.

CVSS 4.0 · 6.6 Medium EPSS < 1% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks Siemens
Products
Cloud Ngfw Pan-os Prisma Access and 3 more
CVE-2026-0261

PAN-OS: Authenticated Admin Command Injection Vulnerability

Multiple command injection vulnerabilities in Palo Alto Networks PAN-OS® software enable an authenticated administrator to bypass system restrictions and run arbitrary commands as a root user. To be able to exploit this issue, the user must have access to the PAN-OS CLI or Web UI. The security risk posed by this issue is significantly minimized when CLI access is restricted to a limited group of administrators and by restricting access to the management web interface to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma Access® are not impacted by these vulnerabilities.

CVSS 4.0 · 5.7 Medium EPSS 1.4% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks Siemens
Products
Cloud Ngfw Pan-os Prisma Access and 3 more
CVE-2026-0258

PAN-OS: Server-Side Request Forgery (SSRF) in IKEv2 Certificate URL Fetching

A server-side request forgery (SSRF) vulnerability in the IKEv2 implementation of Palo Alto Networks PAN-OS® software allows an unauthenticated attacker to cause the firewall to send network requests to unintended destinations or cause a denial of service (DoS) condition. Panorama, Cloud NGFW and Prisma® Access are not impacted by these vulnerabilities.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks Siemens
Products
Cloud Ngfw Pan-os Prisma Access and 3 more
CVE-2026-0256

PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface

A stored cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS® software enables a malicious authenticated administrator to store a JavaScript payload using the web interface. This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma® Access are not impacted by this vulnerability.

CVSS 4.0 · 4.4 Medium EPSS < 1% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks Siemens
Products
Cloud Ngfw Pan-os Prisma Access and 3 more
CVE-2026-0263

PAN-OS: Remote Code Execution (RCE) in IKEv2 Processing

A buffer overflow vulnerability in the IKEv2 processing of Palo Alto Networks PAN-OS® software allows an unauthenticated network-based attacker to execute arbitrary code with elevated privileges on the firewall, or cause a denial of service (DoS) condition. Panorama, Cloud NGFW, and Prisma® Access are not impacted by these vulnerabilities.

CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks
Products
Cloud Ngfw Pan-os Prisma Access and 1 more
CVE-2026-0300

PAN-OS: Unauthenticated user initiated Buffer Overflow Vulnerability in User-ID™ Authentication Portal

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. The risk of this issue is greatly reduced if you secure access to the User-ID™ Authentication Portal per the best practice guidelines https://knowledgebase.paloaltonetworks.com/KCSArticleDetail by restricting access to only trusted internal IP addresses. Prisma Access, Cloud NGFW and Panorama appliances are not impacted by this vulnerability.

CVSS 4.0 · 8.7 High EPSS 41.7% KEV · Listed
Vendors
Palo Alto Networks Paloaltonetworks Siemens
Products
Cloud Ngfw Pan-os Prisma Access and 50 more
CVE-2026-0227

PAN-OS: Firewall Denial of Service (DoS) in GlobalProtect Gateway and Portal

A vulnerability in Palo Alto Networks PAN-OS software enables an unauthenticated attacker to cause a denial of service (DoS) to the firewall. Repeated attempts to trigger this issue results in the firewall entering into maintenance mode.

CVSS 4.0 · 6.6 Medium EPSS < 1% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks
Products
Cloud Ngfw Pan-os Prisma Access and 2 more
CVE-2025-4615

PAN-OS: Improper Neutralization of Input in the Management Web Interface

An improper input neutralization vulnerability in the management web interface of the Palo Alto Networks PAN-OS® software enables an authenticated administrator to bypass system restrictions and execute arbitrary commands. The security risk posed by this issue is significantly minimized when CLI access is restricted to a limited group of administrators. Cloud NGFW and Prisma® Access are not affected by this vulnerability.

CVSS 4.0 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Palo Alto Networks Paloaltonetworks
Products
Pan-os Cloud Ngfw Pan-os and 1 more
CVE-2024-5917

PAN-OS: Server-Side Request Forgery in WildFire

A server-side request forgery in PAN-OS software enables an authenticated attacker with administrative privileges to use the administrative web interface as a proxy, which enables the attacker to view internal network resources not otherwise accessible.

CVSS 4.0 · 2.1 Low EPSS < 1% KEV · Not listed
Vendors
Paloaltonetworks
Products
Cloud Ngfw Pan-os