CVE-2026-0243

Prisma SD-WAN: Denial of Service (DoS) Vulnerability Through IPv6 Crafted Packet

State: Published
Severity: 4.9 Medium
Published: May 13, 2026
Updated: May 14, 2026
Reserved: Nov 3, 2025

Description

A denial of service (DoS) vulnerability in Palo Alto Networks Prisma SD-WAN ION devices enables an unauthenticated attacker in a network adjacent to a Prisma SD-WAN ION device to cause a system disruption by sending a specially crafted IPv6 packet.

Scores

CVSS	Score	Vector	Source
4.0	4.9 Medium	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:U/AU:Y/R:U/V:D/RE:M/U:Amber	palo_alto

Weaknesses

CWE-606 Unchecked Input for Loop Condition

Affected Products

Product	Versions
Prisma SD-WAN IONPalo Alto Networks	6.5.0 to before 25.3.3Affectedfrom 6.5.3-b15Not affected 6.4.0 to before 25.1.8Affectedfrom 6.4.3-b8Not affected 6.3.0 to before 24.3.6Affectedfrom 6.3.6-b10Not affected 6.1.0Not affected 5.6.0Not affected

References

https://security.paloaltonetworks.com/CVE-2026-0243vendor-advisory

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