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…
Browse: All 2015 CVEs · All vendors
- CVSS score
- 9.8 Critical
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- CISA KEV
- Yes — actively exploited (added 2025-10-02, remediation due 2025-10-23)
- Weakness (CWE)
- CWE-287
- Published
- 2015-12-19
- Last modified
- 2026-06-17
- NVD status
- Analyzed
Description
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, 6.3.0r19 before 6.3.0r19b, and 6.3.0r20 before 6.3.0r21 allows remote attackers to obtain administrative access by entering an unspecified password during a (1) SSH or (2) TELNET session.
Affected products
- juniper screenos
Affected ranges per NVD CPE data; confirm exact versions in the vendor advisory.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Federal remediation deadline: 2025-10-23.
How to prioritize this
This vulnerability is on the CISA KEV list, meaning it is being actively exploited — treat it as urgent regardless of the raw CVSS number. Use the live CVE lookup for the latest NVD data, and the CVSS 3.1 calculator to model your own environmental score.
References
- http://arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10713
- http://twitter.com/cryptoron/statuses/677900647560253442
- http://www.forbes.com/sites/thomasbrewster/2015/12/18/juniper-says-it-didnt-work-with-government-to-add-unauthorized-code-to-network-gear/
- http://www.kb.cert.org/vuls/id/640184
- http://www.securityfocus.com/bid/79626
- http://www.securitytracker.com/id/1034489
- http://www.wired.com/2015/12/juniper-networks-hidden-backdoors-show-the-risk-of-government-backdoors/
FAQ
Is CVE-2015-7755 actively exploited?
Yes. CISA added CVE-2015-7755 to its Known Exploited Vulnerabilities (KEV) catalog on 2025-10-02, with a federal remediation deadline of 2025-10-23. A KEV listing means real-world exploitation is confirmed, so patching this should be prioritized above many higher-CVSS bugs that aren't being exploited.
What is the CVSS score of CVE-2015-7755?
CVE-2015-7755 has a CVSS base score of 9.8 (Critical). Its vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Related vulnerabilities
- CVE-2025-21590 — Juniper Junos OS
- CVE-2023-36844 — Juniper Junos OS
- CVE-2023-36845 — Juniper Junos OS
- CVE-2023-36846 — Juniper Junos OS
- CVE-2023-36847 — Juniper Junos OS
- CVE-2023-36851 — Juniper Junos OS
Data source: NVD & CISA KEV. Shown as-is; nothing added. Last generated from NVD data — re-check the live tool for updates.
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