Critical
Junos OS: Unauthorized root command execution when J-Web is enabled
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.
Announced Group revision 1
Original source ↗CVE-2026-101956
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-101956
Junos OS
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Juniper Networks",
"product": "Junos OS",
"versions": [
{
"status": "affected",
"version": "25.2",
"lessThan": "25.2R2-S2",
"versionType": "custom"
},
{
"status": "affected",
"version": "25.4",
"lessThan": "25.4R1-S3",
"versionType": "custom"
},
{
"status": "affected",
"version": "26.2",
"lessThan": "26.2R1-S2",
"versionType": "custom"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-101956
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #28507 · Revision 1
- Added to Heist Feed
- Publisher date