CVE-2026-101956: CWE-287 Improper Authentication in Juniper Networks Junos OS
Description
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.
CVSS v3.1
Score 9.8critical
Affected software
Juniper Networks
Junos OS
pkg:rpm/juniper/junos-osRun 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-2026-101956) involves improper authentication in the J-Web web management component of Juniper Networks Junos OS. An unauthenticated remote attacker can leverage this flaw to execute arbitrary commands with root privileges through the J-Web interface. The affected versions are Junos OS versions >=25.2 and <25.2R2-S2, >=25.4 and <25.4R1-S3, and >=26.2 and <26.2R1-S2. The CVSS v3.1 base score is 9.8, reflecting critical impact on confidentiality, integrity, and availability. The vulnerability is publicly known but no vendor advisory or patch links are provided in the input data.
Potential Impact
An unauthenticated remote attacker can gain root-level command execution on affected Junos OS devices via the J-Web interface. This compromises the confidentiality, integrity, and availability of the device and potentially the network it manages. The high CVSS score (9.8) confirms the critical nature of this vulnerability.
Mitigation Recommendations
Patch status is not yet confirmed — check the Juniper Networks vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the J-Web interface to trusted networks and users to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- juniper
- Date Reserved
- 2026-09-28T16:28:35.624Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6acfaf302cdf04f65694d329
Added to database: 10/14/2026, 16:34:56 UTC
Last enriched: 10/14/2026, 18:49:32 UTC
Last updated: 10/15/2026, 01:08:23 UTC
Views: 9
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