An Improper Authentication vulnerability in J-Web of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network attacker to bypass J-Web authentication and execute CGI content with elevated privileges via a crafted HTTP request.
CVE-2026-101986
CVSS base score
9.8 (v3.1)
Severity
CRITICAL
Attack vector
Network
Weakness
CWE-287
Last modified
October 30, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
juniper junos os evolved
juniper junos
References
- supportportal.juniper.net Vendor Advisory