CVE-2015-7755 KEV
9.8
CRITICAL · CVSS 3.1 · EPSS 61.1% (pctl 99)
Patch first
On CISA KEV — known exploited in the wild, due 2025-10-23.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 61.14% — more likely to be exploited than 99% of all CVEs |
| Weakness | CWE-287 |
| On CISA KEV | yes — remediate by 2025-10-23 |
| Public exploit | none known |
| Published | 2015-12-19 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Juniper ScreenOS Improper Authentication Vulnerability |
|---|---|
| Added | 2025-10-02 |
| Due | 2025-10-23 |
| Vendor / product | Juniper / ScreenOS |
| Ransomware use | none reported |
Affected (1)
| Vendor | Product |
|---|---|
| juniper | screenos |
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/
- https://adamcaudill.com/2015/12/17/much-ado-about-juniper/
- https://forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554
- https://github.com/hdm/juniper-cve-2015-7755
- 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/
- https://adamcaudill.com/2015/12/17/much-ado-about-juniper/
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