CVE-2015-7755
juniper screenos
Published 19 Dec 2015 · updated 17 Jun 2026 · Analyzed
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 2 Oct 2025, with a remediation deadline of 23 Oct 2025 for US federal agencies.
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 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.
References
- arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/ · Third Party Advisory
- kb.juniper.net/InfoCenter/index?page=content&id=JSA10713 · Exploit, Vendor Advisory
- twitter.com/cryptoron/statuses/677900647560253442 · Broken Link
- www.forbes.com/sites/thomasbrewster/2015/12/18/juniper-says-it-didnt-work-with-government-to-add-unauthorized-code-to-network-gear/ · Permissions Required
- www.kb.cert.org/vuls/id/640184 · Third Party Advisory
- www.securityfocus.com/bid/79626 · Broken Link
- www.securitytracker.com/id/1034489 · Broken Link
- www.wired.com/2015/12/juniper-networks-hidden-backdoors-show-the-risk-of-government-backdoors/ · Third Party Advisory
- adamcaudill.com/2015/12/17/much-ado-about-juniper/ · Third Party Advisory
- forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554 · Vendor Advisory
- github.com/hdm/juniper-cve-2015-7755 · Third Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-7755 · US Government Resource