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PatchSiren cyber security CVE debrief

CVE-2026-102040 Juniper Networks CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-10-14T16:51:33.643Z and has not been modified since then. CVE-2026-102040 is a NULL Pointer Dereference vulnerability in Junos OS and Junos OS Evolved that allows an adjacent unauthenticated attacker to crash the routing daemon, causing a denial of service. Network administrators and security teams should prioritize verifying exposure and assessing potential impact. The vulnerability affects Junos OS and Junos OS Evolved systems, and an adjacent unauthenticated attacker can exploit it via an RSVP Path message. The CVE record and source item provide details on the vulnerability,

Vendor
Juniper Networks
Product
Junos OS
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-14
Original CVE updated
2026-10-14
Advisory published
2026-10-14
Advisory updated
2026-10-14

Who should care

Network administrators and security teams responsible for Junos OS and Junos OS Evolved systems should assess exposure and potential impact.

Why it matters

CVE-2026-102040 is a NULL Pointer Dereference vulnerability in Junos OS and Junos OS Evolved that allows an adjacent unauthenticated attacker to crash the routing daemon, causing a denial of service. Network administrators and security teams should prioritize verifying exposure and assessing potential impact.

  • Denial of service via routing daemon crash
  • Potential network instability or downtime
  • Need for verification of Junos OS and Junos OS Evolved versions
  • Potential for adjacent unauthenticated attacker exploitation

Technical summary

A NULL Pointer Dereference vulnerability in the rpd routing daemon of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to crash the routing daemon and cause a denial of service via an RSVP Path message. The vulnerability affects Junos OS and Junos OS Evolved systems, and the attack can be carried out by sending a crafted RSVP Path message. The rpd routing daemon is vulnerable to a NULL pointer dereference, which can be triggered by an adjacent unauthenticated attacker.

Defensive priority

Network administrators and security teams should prioritize verifying exposure and assessing potential impact.

Recommended defensive actions

  • Verify exposure by checking Junos OS and Junos OS Evolved versions
  • Assess potential impact on network operations
  • Implement compensating controls to mitigate potential denial of service
  • Monitor for potential exploitation attempts

Evidence notes

The CVE record and source item provide details on a NULL Pointer Dereference vulnerability in Junos OS and Junos OS Evolved, allowing an adjacent unauthenticated attacker to crash the routing daemon, causing a denial of service.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-102040 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-102040

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-102040 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-102040

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.