CVE-2026-101986
9.8CriticalPublished 14 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Impact
- Full C/I/A compromise
- Weakness
- CWE-287
Impact
Unauthenticated remote attackers can bypass authentication and execute arbitrary CGI scripts with elevated privileges via a crafted HTTP request. They only need network access to the exposed J-Web interface.
Root cause
Improper authentication checks allow attackers to bypass login requirements for J-Web CGI endpoints.
Affected systems
Versions not listed — check the vendor advisory.
CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Fix & remediation
Upgrade to the patched releases specified in vendor advisory JSA112187. As an immediate mitigation, disable J-Web or restrict access to management interfaces using firewall filters.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
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.