Prisma SD-WAN: Denial of Service (DoS) Vulnerability Through IPv6 Crafted Packet
Summary
| CVE | CVE-2026-0243 |
|---|---|
| State | PUBLISHED |
| Assigner | palo_alto |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-13 20:16:18 UTC |
| Updated | 2026-07-14 16:39:30 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 4.9 MEDIUM from [email protected]
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:D/RE:M/U:Amber
EPSS: 0.000340000 probability, percentile 0.100620000 (date 2026-05-25)
Problem Types: CWE-606 | CWE-606 CWE-606 Unchecked Input for Loop Condition
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 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/C... |
| 4.0 | CNA | CVSS | 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/A... |
| 3.1 | [email protected] | Primary | 6.5 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v4.0 Breakdown
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:D/RE:M/U:Amber
CVSS v3.1 Breakdown
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Paloaltonetworks | Prisma Sd-wan | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Palo Alto Networks | Prisma SD-WAN ION | affected 6.5.0 25.3.3 custom | Not specified |
| CNA | Palo Alto Networks | Prisma SD-WAN ION | affected 6.4.0 25.1.8 custom | Not specified |
| CNA | Palo Alto Networks | Prisma SD-WAN ION | affected 6.3.0 24.3.6 custom | Not specified |
| CNA | Palo Alto Networks | Prisma SD-WAN ION | unaffected 6.1.0 custom | Not specified |
| CNA | Palo Alto Networks | Prisma SD-WAN ION | unaffected 5.6.0 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| security.paloaltonetworks.com/CVE-2026-0243 | [email protected] | security.paloaltonetworks.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Palo Alto Networks thanks our internal security research teams for discovering and reporting this issue. (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-05-13T16:00:00.000Z | Initial publication. |
Solutions
CNA: Version Minor Version Suggested Solution Prisma SD-WAN ION 6.5 6.5.1 through 6.5.3 Upgrade to 6.5.3-b15 or later. Prisma SD-WAN ION 6.4 6.4.1 through 6.4.3 Upgrade to 6.4.3-b8 or later. Prisma SD-WAN ION 6.3 6.3.1 through 6.3.6 Upgrade to 6.3.6-b10 or later. Prisma SD-WAN ION 6.1 No action needed. Prisma SD-WAN ION 5.6 No action needed.
Workarounds
CNA: Disable IPv6 on SD-WAN ION devices if not required.
Exploits
CNA: Palo Alto Networks is not aware of any malicious exploitation of this issue.