CVE-2026-101986

Summary

An unauthenticated attacker can bypass J-Web authentication and execute CGI scripts with elevated privileges by crafting specific HTTP requests. This represents a critical authentication flaw that allows remote code execution without any credentials.

Exploitability

Exploitation is straightforward requiring only a network connection to the affected J-Web interface with no prerequisites, making it highly suitable for automated attacks.

Blast radius

The vulnerability affects all Juniper devices running J-Web with default configurations, potentially allowing attackers to gain full system control across entire networks.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Disable J-Web service immediately or restrict access to the J-Web endpoint via network segmentation until a patch is available.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.