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CVE-2026-101967 Juniper Networks CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-10-14T16:15:12.683Z and has not been modified since then. This Junos OS Evolved vulnerability allows unauthenticated root-level compromise via crafted DHCP response when zero-touch provisioning is used. Defenders should assess exposure, prioritize patching or compensating controls, and monitor for suspicious activity. Affected versions include Junos OS Evolved 23.4X100, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.4R1-S3-EVO, and 26.2R1-S2-EVO.

Vendor
Juniper Networks
Product
Junos OS Evolved
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-14
Original CVE updated
2026-10-15
Advisory published
2026-10-14
Advisory updated
2026-10-15

Who should care

Defenders responsible for Junos OS Evolved deployments, especially on PTX Series devices using zero-touch provisioning, should assess exposure and prioritize patching or compensating controls.

Why it matters

CVE-2026-101967 allows unauthenticated root-level compromise of Junos OS Evolved devices via crafted DHCP response when zero-touch provisioning is used. Defenders should prioritize verifying exposure, patching, and monitoring.

  • Verify exposure of Junos OS Evolved deployments using zero-touch provisioning
  • Assess the need for urgent patching or compensating controls
  • Monitor Junos OS Evolved devices for suspicious DHCP activity
  • Implement network segmentation to limit management LAN access

Technical summary

An OS Command Injection vulnerability in the bootzd zero-touch provisioning daemon of Juniper Networks Junos OS Evolved allows an unauthenticated attacker on the management LAN to execute commands as root via a crafted DHCP response. Affected versions include Junos OS Evolved 23.4X100, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.4R1-S3-EVO, and 26.2R1-S2-EVO.

Defensive priority

Defenders should prioritize verifying exposure of Junos OS Evolved deployments using zero-touch provisioning, especially on PTX Series devices, and assess the need for urgent patching or compensating controls.

Recommended defensive actions

  • Verify Junos OS Evolved deployments for exposure, especially on PTX Series devices using zero-touch provisioning
  • Assess the need for urgent patching or compensating controls
  • Inventory and monitor Junos OS Evolved devices for suspicious DHCP activity
  • Implement network segmentation to limit management LAN access

Evidence notes

The CVE record and source item describe an OS Command Injection vulnerability in Junos OS Evolved's bootzd zero-touch provisioning daemon. An unauthenticated attacker on the management LAN can execute commands as root via a crafted DHCP response. Affected versions include Junos OS Evolved 23.4X100, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.4R1-S3-EVO, and 26.2R1-S2-EVO.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-101967 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-101967

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

  • CVE-2026-101967 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-101967

    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.