by Kastro CVE-2026-101986
Juniper Networks Junos OS — Junos OS and Junos OS Evolved: J-Web permits pre-authentication CGI execution
Description · from the CVE record
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.
Affected
ProductAffectedFixed inSource
Junos OS< 23.2R2-S7.723.2R2-S7.7CNA
Junos OS23.4 – < 23.4R2-S8.1323.4R2-S8.13CNA
Junos OS24.2 – < 24.2R2-S5.524.2R2-S5.5CNA
Junos OS24.4 – < 24.4R2-S524.4R2-S5CNA
Junos OS25.2 – < 25.2R2-S225.2R2-S2CNA
Junos OS25.4 – < 25.4R1-S325.4R1-S3CNA
Junos OS26.2 – < 26.2R1-S226.2R1-S2CNA
Junos OS Evolved< 23.2R2-S7.7-EVO23.2R2-S7.7-EVOCNA
Junos OS Evolved23.4 – < 23.4R2-S8.11-EVO23.4R2-S8.11-EVOCNA
Junos OS Evolved24.2 – < 24.2R2-S5.6-EVO24.2R2-S5.6-EVOCNA
Junos OS Evolved24.4 – < 24.4R2-S5-EVO24.4R2-S5-EVOCNA
Junos OS Evolved25.2 – < 25.2R2-S2-EVO25.2R2-S2-EVOCNA
Scores by source
juniper (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
juniper (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total