Overview
Juniper ScreenOS contains an improper authentication vulnerability that could allow unauthorized remote administrative access to the device.
https://supportportal.juniper.net/s/article/2015-12-Out-of-Cycle-Security-Bulletin-ScreenOS-Multiple-Security-issues-with-ScreenOS-CVE-2015-7755-CVE-2015-7756 ; https://nvd.nist.gov/vuln/detail/CVE-2015-7755
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2015-7755 |
| Vendor / Product | Juniper — ScreenOS |
| NVD Published | 2015-12-19 |
| NVD Last Modified | 2025-10-22 |
| CVSS 3.1 Score | 9.8 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Severity | CRITICAL |
| CWE | CWE-287 |
| CISA KEV Added | 2025-10-02 |
| CISA KEV Deadline | 2025-10-23 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2025-10-23.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Timeline
| Date | Event |
|---|---|
| 2025-10-02 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2025-10-23 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2015-7755 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |