CVE-2026-101986
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Juniper Junos Os Evolved
PublishedOct 14, 2026
First seenOct 14, 2026
Weakness typeCWE-287Improper authentication
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| juniper junos_os_evolved | v ≤ 23.1, 23.2, 23.4, 23.4x100, 24.2, 24.4, 25.2, 25.2x100, 25.4, 25.4x300, 26.2 | — |
| juniper junos | v ≤ 23.1, 23.2, 23.4, 24.2, 24.4, 25.2, 25.4, 26.2 | — |
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