CVE-2023-36846
JU
Juniper Junos OS
Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability
What it is
Juniper Junos OS on SRX Series contains a missing authentication for critical function vulnerability that allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity. With a specific request to user.php that doesn't require authentication, an attacker is able to upload arbitrary files via J-Web, leading to a loss of integrity for a certain part of the file system, which may allow chaining to other vulnerabilities.
What to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor notices and references
- supportportal.juniper.net/s/article/2023-08-Out-of-Cycle-Security-Bulletin-Junos-OS-SRX-Se
- nvd.nist.gov/vuln/detail/CVE-2023-36846
Description and required action as published by CISA. Full record at NVD.
Other Juniper entries on the list
- ScreenOS Juniper ScreenOS Improper Authentication Vulnerability CVE-2015-7755 · Oct 2, 2025
- Junos OS Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability CVE-2025-21590 · Mar 13, 2025
- Junos OS Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability CVE-2023-36851 · Nov 13, 2023
- Junos OS Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability CVE-2023-36847 · Nov 13, 2023
- Junos OS Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability CVE-2023-36845 · Nov 13, 2023
- Junos OS Juniper Junos OS EX Series PHP External Variable Modification Vulnerability CVE-2023-36844 · Nov 13, 2023