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CISA Known Exploited Vulnerability

This CVE is actively exploited in the wild. CISA mandates federal agencies to patch immediately.

CVE

CVE-2023-36844

5.3

CVSSmedium

Exploitable remotely over the internet · no authentication required.

Description

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. Using a crafted request an attacker is able to modify certain PHP environment variables leading to partial loss of integrity, which may allow chaining to other vulnerabilities. This issue affects Juniper Networks Junos OS on EX Series: * All versions prior to 20.4R3-S9; * 21.1 versions 21.1R1 and later; * 21.2 versions prior to 21.2R3-S7; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S5; * 22.1 versions prior to 22.1R3-S4; * 22.2 versions prior to 22.2R3-S2; * 22.3 versions prior to 22.3R3-S1; * 22.4 versions prior to 22.4R2-S2, 22.4R3; * 23.2 versions prior to 23.2R1-S1, 23.2R2.

Attack Vector

Network

Privileges Req.

None

User Interaction

None

junos os

Updated Sep 28, 2026View on NVD →

S4E scanner

mediumProduct Based Web Vulnerabilities~10 seconds

CVE-2023-36844 Scanner

Detects 'Remote Code Execution (RCE)' vulnerability in Juniper Networks Junos OS affects v. prior to 20.4R3-S9; 21.1 versions 21.1R1 and later; 21.2 versions prior to 21.2R3-S7; 21.3 versions prior to 21.3R3-S5; 21.4 versions prior to 21.4R3-S5; 22.1 versions prior to 22.1R3-S4; 22.2 versions prior to 22.2R3-S2; 22.3 versions prior to 22.3R3-S1; 22.4 versions prior to 22.4R2-S2, 22.4R3; 23.2 versions prior to 23.2R1-S1, 23.2R2.

Used 3.4k times · 3.4k assets checked · domain, ipv4, subdomain

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CVE history: junos os

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