CVE-2023-36846
Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability
MITRE ATT&CK techniques
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Summary
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.
Affected software
Vendor: Juniper · Product: Junos OS
Weakness types (CWE):
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in Juniper
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2023-36845 | Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vul | 94.2% | Yes |
| CVE-2023-36844 | Juniper Junos OS EX Series PHP External Variable Modification Vulnerability | 91.4% | Yes |
| CVE-2023-36847 | Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerab | 84.7% | Yes |
| CVE-2015-7755 | Juniper ScreenOS Improper Authentication Vulnerability | 61.4% | Yes |
| CVE-2020-1631 | Juniper Junos OS Path Traversal Vulnerability | 4.7% | Yes |
| CVE-2025-21590 | Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability | 1.7% | Yes |
| CVE-2023-36851 | Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnera | 1.1% | Yes |
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