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CVE-2023-36851: Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability
Juniper Junos OS · in CISA KEV since 2023-11-13
2023-11-13added to KEV
2023-11-17federal remediation due date
1.12%EPSS exploit probability (30 days) 64.8th percentile
5.3 MEDIUMCVSS 3.1
Unknownknown ransomware use
47days from NVD publication to KEV
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 webauth_operation.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.
Required action (CISA)
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-306 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| NVD published | 2023-09-27 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2023-36851.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.