High7.1Palo Alto Networks

High [CVE-2026-0243] denial of service (DoS) vulnerability in Palo Alto Networks Prisma SD-WAN ION devices

This high-severity Palo Alto Networks advisory covers CVE-2026-0243 affecting Prisma SD-WAN.

CVE-2026-0243 Published May 13, 2026Updated by vendor Jun 17, 2026

CVE-2026-0243

Affected products & platforms

Palo Alto NetworksPrisma Access

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Summary

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.

Affected versions

Prisma SD-WAN ION 6.5: < 6.5.3-b15
Prisma SD-WAN ION 6.4: < 6.4.3-b8
Prisma SD-WAN ION 6.3: < 6.3.6-b10

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

Prisma SD-WAN ION >= 6.5.3-b15
Prisma SD-WAN ION >= 6.4.3-b8
Prisma SD-WAN ION >= 6.3.6-b10

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Upgrade to a fixed release: Prisma SD-WAN ION >= 6.5.3-b15; Prisma SD-WAN ION >= 6.4.3-b8; Prisma SD-WAN ION >= 6.3.6-b10.

Temporary workarounds

Disable IPv6 on SD-WAN ION devices if not required.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Palo Alto Networks Security Advisoriesofficial
Official vendor feed — the source of truth for this advisory. VulniPulse polled this feed and parsed this entry from it. Discovered from the machine-readable feed https://security.paloaltonetworks.com/rss.xml; this link opens the Palo Alto Networks advisory index instead of the raw feed document.
Palo Alto Networks
Vendor advisory pageofficial
Advisory page fetched and parsed to extract affected/fixed versions and mitigation guidance beyond what the feed carries.
Palo Alto Networks

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-0243NVD CVE.org MITRE

Official resources

Prisma Access / Prisma documentation
Official documentation
Official Prisma product documentation for the affected component.
Palo Alto Networks Security Advisories portal
Official documentation
Canonical advisory portal — check here for the latest revision of this advisory and affected-version updates.

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