CVE-2026-102086
Received
Received - Intake
NULL Pointer Dereference in Juniper Junos OS DNS Plugin
Vulnerability report for CVE-2026-102086, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-14
Last updated on: 2026-10-14
Assigner: Juniper Networks, Inc.
Description
Description
A NULL Pointer Dereference vulnerability in the DNS plugin of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a complete Denial-of-Service (DoS).
When multiple DNS queries are received in a single flow session, where one query matches a Security Intelligence (SecIntel) feed and another query is sent for DNS Domain Generation Algorithm (DGA) analysis, an error in processing logging of these asynchronous tasks can lead to an FPC crash. The exact timing conditions are outside an attacker's direct control.
This issue affects Junos OS on SRX Series:
* All versions before 23.2R2-S7.7;
* from 23.4 before 23.4R2-S8.13;
* from 24.2 before 24.2R2-S5.5;
* from 24.4 before 24.4R2-S4;
* from 25.2 before 25.2R2-S1;
* from 25.4 before 25.4R1-S2.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Juniper | Networks | Junos OS 0 |
| Juniper | Networks | Junos OS 23.4 |
| Juniper | Networks | Junos OS 24.2 |
| Juniper | Networks | Junos OS 24.4 |
| Juniper | Networks | Junos OS 25.2 |
| Juniper | Networks | Junos OS 25.4 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-476 | The product dereferences a pointer that it expects to be valid but is NULL. |
