High severity · published May 13, 2026
CVE-2026-0244
Prisma SD-WAN: Improper Certificate Validation Vulnerability
8.1
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PS
Prisma SD-WAN ION · Palo Alto Networks
6.5.0 before 6.5.3-b15; 6.4.0 before 6.4.3-b8; 6.3.0 before 6.3.6-b10 · source: vendor
PS
Prisma Sd-wan · Paloaltonetworks
6.3.1 before 6.3.6; 6.4.1 before 6.4.3; 6.5.1 before 6.5.3; 6.3.6; 6.3.6; 6.3.6; +7 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0244
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0244
Vendor Advisory
https://security.paloaltonetworks.com/CVE-2026-0244
More from Prisma SD-WAN ION
6.5
CVE-2026-0243
Prisma SD-WAN: Denial of Service (DoS) Vulnerability Through IPv6 Crafted Packet