Auth bypass in Juniper Screenos
CVE-2015-7755
Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r14b, 6.3.0r15 before 6.3.0r15b, 6.3.0r16 before 6.3.0r16b, 6.3.0r17 before 6.3.0r17b, 6.3.0r18 before 6.3.0r18b, 6.3.0r…
Vulnerability class: Broken Authentication
EPSS: 0.614 (99.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Juniper Screenos — versions 6.3.0
- N/a — versions n/a
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
Public proof-of-concept exploits
References
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (vdb-entry, Broken Link)
- cve@mitre.org (Third Party Advisory, third-party-advisory)
- cve@mitre.org (Vendor Advisory)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Exploit, Vendor Advisory)
- cve@mitre.org (Broken Link)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Permissions Required)
Frequently asked questions
- What is CVE-2015-7755?
- CVE-2015-7755 is a critical-severity vulnerability in Juniper Screenos, classified under Improper Authentication. CVSS score: 9.8/10. Published 2015-12-19.
- How severe is CVE-2015-7755?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2015-7755 known to be exploited?
- Yes. CVE-2015-7755 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-10-02), indicating it is being actively exploited. 23 public proof-of-concept repositories are indexed.