CVE-2026-101956
Junos OS: Unauthorized root command execution when J-Web is enabled
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-287 |
| Vendor | juniper networks |
| Product | junos os |
| Published | Oct 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Juniper Networks / Junos OS
25.2 < 25.2R2-S2 25.4 < 25.4R1-S3 26.2 < 26.2R1-S2