CVE-2026-102018: CWE-476 NULL Pointer Dereference in Juniper Networks Junos OS
Description
CVE-2026-102018 is a NULL Pointer Dereference vulnerability in the rpd process of Juniper Networks Junos OS and Junos OS Evolved. It allows an unauthenticated adjacent attacker to cause a denial-of-service (DoS) condition by sending a malformed PIM Bidir message. The vulnerability affects multiple versions of Junos OS and Junos OS Evolved prior to specific fixed releases. The CVSS v3.1 base score is 6.5, indicating a medium severity impact focused on availability disruption without confidentiality or integrity impact.
CVSS v3.1
Score 6.5medium
Affected software
Juniper Networks
Junos OS
Juniper Networks
Junos OS Evolved
pkg:rpm/juniper/junos-ospkg:rpm/juniper/junos-os-evoRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-102018) exists in the rpd process of Juniper Networks Junos OS and Junos OS Evolved. An unauthenticated attacker with adjacent network access can trigger a NULL Pointer Dereference by sending a malformed Protocol Independent Multicast (PIM) Bidirectional message. This causes the affected process to crash, resulting in a denial-of-service condition. The flaw does not affect confidentiality or integrity but impacts system availability. Multiple versions of Junos OS and Junos OS Evolved are affected, with fixed versions starting from 23.2R2-S7.7 and corresponding releases for other branches.
Potential Impact
The vulnerability allows an unauthenticated attacker with adjacent network access to cause a denial-of-service by crashing the rpd process through a malformed PIM Bidir message. This disrupts network routing functionality but does not compromise confidentiality or integrity of the system. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no explicit patch links or official fixes are provided in the input data, users should monitor Juniper Networks advisories for updates. Until a fix is available, network administrators should consider limiting adjacent network access to trusted entities and monitor for malformed PIM Bidir messages as a precaution.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- juniper
- Date Reserved
- 2026-09-28T17:33:49.410Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6acfb6722cdf04f656979513
Added to database: 10/14/2026, 17:05:54 UTC
Last enriched: 10/14/2026, 17:19:37 UTC
Last updated: 10/14/2026, 19:00:32 UTC
Views: 3
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