Improper Cert Validation in Palo Alto Networks Prisma SD-WAN ION Allows MitM
CVE-2026-0244 Published on May 13, 2026
Prisma SD-WAN: Improper Certificate Validation Vulnerability
An improper certificate validation vulnerability in the Palo Alto Networks Prisma SD-WAN ION enables man-in-the-middle (MitM) attacker to impersonate the controller.
Timeline
Initial publication.
Weakness Type
Improper Certificate Validation
The software does not validate, or incorrectly validates, a certificate. When a certificate is invalid or malicious, it might allow an attacker to spoof a trusted entity by interfering in the communication path between the host and client. The software might connect to a malicious host while believing it is a trusted host, or the software might be deceived into accepting spoofed data that appears to originate from a trusted host.
Products Associated with CVE-2026-0244
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Affected Versions
Palo Alto Networks Prisma SD-WAN ION:- Version 6.5.0 and below 6.5.3-b15 is affected.
- Version 6.4.0 and below 6.4.3-b8 is affected.
- Version 6.3.0 and below 6.3.6-b10 is affected.
- Version 6.1.0 is unaffected.
- Version 5.6.0 is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.