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Vulnerabilities

Vulnerability · CVE-2026-0244

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.

Published May 13, 2026 · catalog updated Jul 14, 2026 · prisma sd-wan

Check if you run it

No confirmed exploitation is on record for CVE-2026-0244. EPSS is 0.22%. Act only if a listed version of prisma sd-wan is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.22%
Remediation
Advisory link
Affected products
cpe paloaltonetworks/prisma sd-wan

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe paloaltonetworks/prisma sd-wan6.3.6
  • cpe paloaltonetworks/prisma sd-wan6.4.3

How to fix CVE-2026-0244

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-0244. EPSS is 0.22%. Act only if a listed version of prisma sd-wan is installed.

Which versions are affected?

Compare what you have installed with paloaltonetworks/prisma sd-wan 6.3.6; paloaltonetworks/prisma sd-wan 6.4.3. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-295: Improper Certificate Validation. EPSS 0.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 13, 2026 · NIST NVD

    Detected

    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.

  2. Jul 14, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-0244

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-0244

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-0244

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.