CVE Watch—

CVE-2023-36844

Juniper Junos OS EX Series PHP External Variable Modification Vulnerability

CVSS

—

No CVSS

EPSS

91.0%

p100

KEV

YES

Nov 13, 2023

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

89.6%EPSS · 30 days91.0%

2026-06-302026-07-16

KEV catalog record

Product

Juniper / Junos OS

Vulnerability

Juniper Junos OS EX Series PHP External Variable Modification Vulnerability

Added to KEV

Nov 13, 2023

Remediate by

Nov 17, 2023

Known ransomware use

Summary description

Juniper Junos OS on EX Series contains a PHP external variable modification vulnerability that 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.

Required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Notes

https://supportportal.juniper.net/s/article/2023-08-Out-of-Cycle-Security-Bulletin-Junos-OS-SRX-Series-and-EX-Series-Multiple-vulnerabilities-in-J-Web-can-be-combined-to-allow-a-preAuth-Remote-Code-Execution?language=en_US ; https://nvd.nist.gov/vuln/detail/CVE-2023-36844

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