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CVE.org (no NVD analysis yet)· CNA palo_alto

CVE-2026-0321: PAN-OS: Denial of Service (DoS) Vulnerabilities in Network Services

MediumCVSS 6.6 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 26/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.33% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Palo Alto Networks PAN-OS 10.2.10-h41, 10.2.13-h26, 10.2.16-h11; Palo Alto Networks Prisma Access 10.2.10-h41, 11.2.7-h21, 12.1.7-h8.

Low priority for now. Upgrade to Palo Alto Networks PAN-OS 10.2.10-h41, 10.2.13-h26, 10.2.16-h11; Palo Alto Networks Prisma Access 10.2.10-h41, 11.2.7-h21, 12.1.7-h8 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Denial of service vulnerabilities in Palo Alto Networks PAN-OS® software allow an unauthenticated attacker with network access to cause a denial of service (DoS) condition by sending specially crafted network traffic to or through a dataplane interface. Repeated attempts to trigger this condition result in the firewall entering maintenance mode. Cloud NGFW and Panorama are not affected by this vulnerability.

Published
Oct 14, 2026
Updated
Nov 10, 2026
EPSS
0.3% · 27th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.6 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · palo_alto
6.6
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-0321

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

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 Cloud NGFW

    • Allnot affected

  • Palo Alto Networks PAN-OS

    • 12.2.0 and later · before 12.2.4affectedfixed in 12.2.4
    • 12.1.0 and later · before 12.1.10-h2affectedfixed in 12.1.10-h2, 12.1.7-h8, 12.1.4-h12
    • 11.2.0 and later · before 11.2.16affectedfixed in 11.2.16, 11.2.13-h3, 11.2.10-h15, 11.2.7-h21, 11.2.4-h22
    • 11.1.0 and later · before 11.1.16-h3affectedfixed in 11.1.16-h3, 11.1.13-h15, 11.1.10-h35, 11.1.7-h11, 11.1.6-h39, 11.1.4-h37
    • 10.2.0 and later · before 10.2.18-h12affectedfixed in 10.2.18-h12, 10.2.16-h11, 10.2.13-h26, 10.2.10-h41, 10.2.7-h38

  • Palo Alto Networks Prisma Access

    • 12.1.0 and later · before 12.1.7-h8affectedfixed in 12.1.7-h8
    • 11.2.0 and later · before 11.2.7-h21affectedfixed in 11.2.7-h21
    • 10.2.0 and later · before 10.2.10-h41affectedfixed in 10.2.10-h41

Same product

palo alto networks: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-0128PAN-OS: Firewall Denial of Service (DoS) Using a Specially Crafted Packet
    34Monitor
  • CVE-2024-9472PAN-OS: Firewall Denial of Service (DoS) Using Specially Crafted Traffic
    34Monitor
  • CVE-2025-4230PAN-OS: Authenticated Admin Command Injection Vulnerability Through CLI
    33Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-0309Sep 10, 2026 · PAN-OS: Authenticated Command Injection in CLI with Luna HSM Configuration
    16Monitor
  • ← EarlierCVE-2026-0310Sep 10, 2026 · PAN-OS: Buffer Overflow Vulnerability via XML Processing
    28Monitor
  • Later →CVE-2026-0316Oct 14, 2026 · PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability
    4Monitor

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 PAN-OS10.2.10-h41Vendor (CNA)
Palo Alto Networks PAN-OS10.2.13-h26Vendor (CNA)
Palo Alto Networks PAN-OS10.2.16-h11Vendor (CNA)
Palo Alto Networks PAN-OS10.2.18-h12Vendor (CNA)
Palo Alto Networks PAN-OS10.2.7-h38Vendor (CNA)
Palo Alto Networks PAN-OS11.1.10-h35Vendor (CNA)
Palo Alto Networks PAN-OS11.1.13-h15Vendor (CNA)
Palo Alto Networks PAN-OS11.1.16-h3Vendor (CNA)
Palo Alto Networks PAN-OS11.1.4-h37Vendor (CNA)
Palo Alto Networks PAN-OS11.1.6-h39Vendor (CNA)
Palo Alto Networks PAN-OS11.1.7-h11Vendor (CNA)
Palo Alto Networks PAN-OS11.2.10-h15Vendor (CNA)
Palo Alto Networks PAN-OS11.2.13-h3Vendor (CNA)
Palo Alto Networks PAN-OS11.2.16Vendor (CNA)
Palo Alto Networks PAN-OS11.2.4-h22Vendor (CNA)
Palo Alto Networks PAN-OS11.2.7-h21Vendor (CNA)
Palo Alto Networks PAN-OS12.1.10-h2Vendor (CNA)
Palo Alto Networks PAN-OS12.1.4-h12Vendor (CNA)
Palo Alto Networks PAN-OS12.1.7-h8Vendor (CNA)
Palo Alto Networks PAN-OS12.2.4Vendor (CNA)
Palo Alto Networks Prisma Access10.2.10-h41Vendor (CNA)
Palo Alto Networks Prisma Access11.2.7-h21Vendor (CNA)
Palo Alto Networks Prisma Access12.1.7-h8Vendor (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.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 13, 2026+30 d
EPSS, last 120 days

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

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.

  • CVE-2026-0229245 days apartPAN-OS: Denial of Service in Advanced DNS Security Feature
    26Monitor
  • CVE-2025-4619335 days apartPAN-OS: Firewall Denial of Service (DoS) Using Specially Crafted Packets
    26Monitor
  • CVE-2026-03190 days apartPAN-OS: Improper Input Handling Vulnerability
    19Monitor
  • CVE-2026-03180 days apartPAN-OS: Denial of Service (DoS) on Panorama
    18Monitor
  • CVE-2026-03170 days apartPAN-OS: Denial of Service Vulnerability
    4Monitor

Not on record for this CVE: patch commit or PR link · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet 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
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-754 · Improper Check for Unusual or Exceptional Conditions

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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:N/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.

Change log

  1. SSVC exploitation— → none
  2. Exploit maturity— → none
  3. Fix✗ → ✓

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

References

Show all references (1 more)

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

All records