Palo Alto Networks Prisma SD-WAN ION Improper Certificate Validation Vulnerability Allowing Man-in-the-Middle Attacks

Vulnerability

A vulnerability allowing improper certificate validation has been identified in Palo Alto Networks Prisma SD-WAN ION. This issue enables a man-in-the-middle (MitM) attacker to impersonate the controller. The vulnerability exists in versions 6.5.1 prior to 6.5.3-b15, 6.4.1 prior to 6.4.3-b8, and 6.3.1 prior to 6.3.6-b10.

Impact

Exploitation of this vulnerability could lead to man-in-the-middle attacks, allowing an attacker to impersonate the controller and potentially intercept or manipulate communications.

Remediation

Users can upgrade to Prisma SD-WAN ION 6.5.3-b15 or later, 6.4.3-b8 or later, or 6.3.6-b10 or later. For those using versions 6.1 or 5.6, no action is needed.

Added: May 13, 2026, 7:42 PM
Updated: May 13, 2026, 7:42 PM

Vulnerability Rating

Custom Algorithm
spread
0.0
impact
5.0
exploitability
4.5
remediation
0.0
relevance
8.2
threat
0.0
urgency
5.7
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.