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Advisory severityCritical9.8Juniper Networks

Critical [CVE-2026-101956] Junos OS: Unauthorized root command execution when J-Web is enabled

This critical-severity Juniper Networks advisory covers CVE-2026-101956 affecting Junos OS.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-101956 Source published Source updated

VulniPulse record published Record updated

CVE-2026-101956
Affected products & platforms
Juniper NetworksJunos
Open source advisory

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Summary

An Improper Authentication vulnerability in the J-Web web management component of Juniper Networks Junos OS allows an unauthenticated remote attacker to execute arbitrary Junos commands with root privileges via the exposed J-Web web interface.

Affected versions
  • Junos OS 25.2 before 25.2R2-S2
  • Junos OS 25.4 before 25.4R1-S3
  • Junos OS 26.2 before 26.2R1-S2

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Fixed versions
  • 25.2R2-S2
  • 25.4R1-S3
  • 26.2R1-S2

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Mitigation

Upgrade to a fixed release: 25.2R2-S2, 25.4R1-S3, 26.2R1-S2. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Discussion(0)

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