EUVD-2026-42680
GHSA-ww6g-3h8v-p3mx
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:D/RE:M/U:Amber
AC:H maps to CVSS 4.0 AT:P prerequisite of reaching a typically restricted management interface; UI:R captures mandatory admin click; no scope change.
Primary rating from Vendor (paloaltonetworks).
CVSS VectorVendor: paloaltonetworks
Lifecycle Timeline
2DescriptionCVE.org
An information disclosure vulnerability in Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to the management web interface to obtain web session tokens. This requires a legitimate user to first click on a malicious link provided by the attacker.
The security risk posed by this issue is minimized 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 this vulnerability.
AnalysisAI
Web session token theft from PAN-OS management interfaces affects PA-Series and VM-Series firewalls and Panorama deployments, enabling a network-adjacent unauthenticated attacker to hijack authenticated administrator sessions. Exploitation depends on a legitimate management user clicking an attacker-crafted malicious link while an active session exists - a social engineering prerequisite that substantially reduces real-world risk. No public exploit code exists (CVSS 4.0 E:U) and the issue is not listed in CISA KEV; the vendor rates overall CVSS 4.0 severity at 2.1, reflecting these mitigating factors.
Technical ContextAI
CWE-524 (Use of Cache Containing Sensitive Information) identifies the root cause: the PAN-OS management web interface exposes active session tokens through a caching mechanism accessible to an attacker when a victim follows a malicious link. The management interface is the primary attack surface - it runs on PA-Series hardware firewalls, VM-Series virtual firewalls, and Panorama management appliances (both virtual and M-Series hardware), but is explicitly absent from Cloud NGFW and Prisma Access architectures. The CVSS 4.0 AT:P (Attack Requirements: Present) metric confirms that specific preconditions - namely, network reachability to the management web interface - must exist before the cache disclosure can be triggered. The UI:A metric confirms active social engineering is required, not passive or drive-by exploitation.
RemediationAI
Consult the vendor advisory at https://security.paloaltonetworks.com/CVE-2026-0281 for patched PAN-OS version details, which are not specified in the currently available data. As the primary compensating control - and vendor-recommended best practice regardless of this CVE - restrict access to the PAN-OS management web interface to only trusted internal IP addresses using management interface access restrictions (permitted IP list), as detailed at https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431. This single control eliminates the network access prerequisite (AT:P) that makes exploitation possible, effectively removing the attack surface entirely. As a secondary measure, security awareness training for administrators to avoid clicking unsolicited links while authenticated to management consoles reduces social-engineering risk. Note that restricting the management interface may require out-of-band access paths and should be tested to avoid lockout.
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Same technique Information Disclosure
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External POC / Exploit Code
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