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CVE-2026-0243· NVD / CVE Program· CNA palo_alto

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

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.

MediumCVSS 4.9 · v4.0—No exploit Fix available
Published
May 13, 2026
Updated
Jul 14, 2026
EPSS
0.2% · 6th percentile
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Report tools

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Action score

19

Monitor

Low priority for now.

CVSS
19 / 40 · 4.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · palo_alto
4.9
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
paloaltonetworksprisma sd-wan
paloaltonetworksion 1200
paloaltonetworksion 1200-c-na
paloaltonetworksion 1200-c-row
paloaltonetworksion 1200-c5g-ww
paloaltonetworksion 1200-s
paloaltonetworksion 1200-s-c-na
paloaltonetworksion 1200-s-c-row
paloaltonetworksion 1200-s-c5g-ww
paloaltonetworksion 3102v
paloaltonetworksion 3104v
paloaltonetworksion 3108v

and 8 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • paloaltonetworks prisma sd-wan6.3.1 and later · before 6.3.6
  • paloaltonetworks prisma sd-wan6.4.1 and later · before 6.4.3
  • paloaltonetworks prisma sd-wan6.5.1 and later · before 6.5.3
  • paloaltonetworks prisma sd-wan6.3.6
  • paloaltonetworks prisma sd-wan6.4.3
  • paloaltonetworks prisma sd-wan6.5.3

Versions reported by the vendor

Affected version ranges reported by the assigning authority (palo_alto). Independent of NVD's CPE analysis and usually ahead of it.

  • Palo Alto Networks Prisma SD-WAN ION

    • 6.1.0, 5.6.0not affected
    • 6.5.0 and later · before 25.3.3affectedfixed in 6.5.3-b15
    • 6.4.0 and later · before 25.1.8affectedfixed in 6.4.3-b8
    • 6.3.0 and later · before 24.3.6affectedfixed in 6.3.6-b10

Same product

paloaltonetworks: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-0244Prisma SD-WAN: Improper Certificate Validation Vulnerability
    20Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Palo Alto Networks Prisma SD-WAN ION6.3.6-b10Vendor (CNA)
Palo Alto Networks Prisma SD-WAN ION6.4.3-b8Vendor (CNA)
Palo Alto Networks Prisma SD-WAN ION6.5.3-b15Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-606 · Unchecked Input for Loop Condition

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records