CVE-2026-101986CWE-287

CVE-2026-101986

Critical · published October 14, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
46.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L
EPSS
0.00578 · 46.8th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-10-14T21:17Z
References (1)
https://supportportal.juniper.net/JSA112187 · [email protected]
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 1%
    epss
  • 14 OCT 16:20Z
    Junos OS and Junos OS Evolved: J-Web permits pre-authentication CGI execution
    cvelistv5
  • 14 OCT 16:20Z
    Junos OS and Junos OS Evolved: J-Web permits pre-authentication CGI execution
    cvelistv5