CVE-2023-36851
Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability
IN CISA KEV
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.
- Vendor
- Juniper
- Product
- Junos OS
- CVSS
- No score recorded (no NVD record loaded for this entry)
- CWE
- CWE-306
- Published
- Not recorded
- NVD modified
- Not recorded
CISA KEV
- Date added
- 2023-11-13
- Due date
- 2023-11-17
- Ransomware use
- Unknown
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS
1.12% chance of exploitation in the next 30 days (percentile 65th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.