Junos OS - RCE (CVE-2023-36844)
185Exploiting IPs reported
A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to control certain, important environment variables.
CrowdSec analysis
CVE-2023-36844 is a vulnerability in the J-Web interface of Juniper Networks Junos OS, which enables unauthenticated attackers to modify critical environment variables through crafted requests.
CrowdSec has been tracking this vulnerability and its exploits since 1st of April 2025.
Data from the CrowdSec community indicates that exploitation of CVE-2023-36844 is highly selective and intelligence-driven. Threat actors use advanced reconnaissance and carefully choose their targets, often as part of sophisticated campaigns or advanced persistent threat operations. CrowdSec network telemetry also shows that exploitation of CVE-2023-36844 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.
Observed attack patterns are aimed at the /webauth_operation.php endpoint, focusing on systems with publicly exposed interfaces.
Exploitation
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Protection
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Blocklist
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