CVE-2015-7755VulnerabilityPublished 10/02/2025Updated 10/24/2026
CVE-2015-7755: Juniper ScreenOS Improper Authentication Vulnerability
Affects Juniper ScreenOSSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 10/02/2025
- KEV deadline
- 10/23/2025
- EPSS
- 61.1% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description
Juniper ScreenOS contains an improper authentication vulnerability that could allow unauthorized remote administrative access to the device.
Weaknesses
References
- supportportal.juniper.net/s/article/2015-12-Out-of-Cycle-Security-Bulletin-ScreenOS-Multiple-Security-issues-with-ScreenOS-CVE-2015-7755-CVE-2015-7756 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2015-7755 (opens in a new tab)
- cisa.gov/known-exploited-vulnerabilities-catalog?search=CVE-2015-7755 (opens in a new tab)