CVE-2023-36846 — Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability

CVE-2023-36846 (Juniper Junos OS) is in the CISA Known Exploited Vulnerabilities catalog since 2023-11-13. Juniper Junos OS on SRX Series contains a missing authentication for critical function vulnerability that… See the required fix, due date and advisories.

Exploitation status

CVE-2023-36846 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2023-11-13. 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.

Advisory facts

Vendor or project
Juniper
Affected product
Junos OS
Added to CISA KEV
2023-11-13
US federal remediation due date
2023-11-17
Ransomware association
Unknown
EPSS score
—
Weakness (CWE)
CWE-306

Remediation: the required action

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

Wording published by CISA for this catalog entry. It is the baseline action, not a decision about your environment: whether this exposure matters for you depends on where the affected component runs, what it is exposed to and who owns it.

From advisory to a decision you can defend

A catalog entry tells you a vulnerability is being exploited somewhere. It does not tell you whether it matters in your estate, who owns the fix, or what evidence an auditor will ask for later. That is the work VulnTrek does: it takes findings from the tools you already run, decides which exposure actually matters, routes it to an owner, keeps remediation human-approved and retains the lineage as evidence.

Sourced from public upstream advisories (CISA KEV, ENISA EUVD, vendor PSIRTs) mirrored daily. Informational only — not a remediation decision, not legal advice, and the absence of a record is not evidence of safety.