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The vulnerability of the ScreenOS operating system, related to deficiencies in authentication procedures, allows a perpetrator to connect to the device with administrator privileges.

🗓️ 28 Dec 2015 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec🔗 bdu.fstec.ru👁 6 Views

ScreenOS authentication flaw lets remote attacker gain administrator access via SSH or TELNET.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
GithubExploit		Exploit for Improper Authentication in Juniper Screenos
9 Jan 201622:49
–githubexploit
ATTACKERKB		CVE-2015-7755
19 Dec 201500:00
–attackerkb
Circl		CVE-2015-7755
21 Dec 201511:58
–circl
CISA KEV Catalog		Juniper ScreenOS Improper Authentication Vulnerability
2 Oct 202500:00
–cisa_kev
CISA		 CISA Adds Five Known Exploited Vulnerabilities to Catalog
2 Oct 202512:00
–cisa
CNVD		Backdoor Vulnerability in Juniper Networks ScreenOS (CNVD-2015-08307)
21 Dec 201500:00
–cnvd
Check Point Advisories		Juniper Networks ScreenOS Authentication Bypass (CVE-2015-7755)
21 Dec 201500:00
–checkpoint_advisories
CVE		CVE-2015-7755
19 Dec 201511:00
–cve
Cvelist		CVE-2015-7755
19 Dec 201511:00
–cvelist
EUVD		EUVD-2015-7656
7 Oct 202500:30
–euvd
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Vulners
Node
juniper_networksscreenosRange6.2.0r15–6.2.0r18
OR
juniper_networksscreenosRange6.3.0r12–6.3.0r12b
OR
juniper_networksscreenosRange6.3.0r13–6.3.0r13b
OR
juniper_networksscreenosRange6.3.0r14–6.3.0r14b
OR
juniper_networksscreenosRange6.3.0r15–6.3.0r15b
OR
juniper_networksscreenosRange6.3.0r16–6.3.0r16b
OR
juniper_networksscreenosRange6.3.0r17–6.3.0r17b
OR
juniper_networksscreenosRange6.3.0r18–6.3.0r18b
OR
juniper_networksscreenosRange6.3.0r19–6.3.0r19b
OR
juniper_networksscreenosRange6.3.0r20–6.3.0r21
SourceLink
arstechnicawww.arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/
forbeswww.forbes.com/sites/thomasbrewster/2015/12/18/juniper-says-it-didnt-work-with-government-to-add-unauthorized-code-to-network-gear/
wiredwww.wired.com/2015/12/juniper-networks-hidden-backdoors-show-the-risk-of-government-backdoors/
kbwww.kb.juniper.net/InfoCenter/index
githubwww.github.com/hdm/juniper-cve-2015-7755
twitterwww.twitter.com/cryptoron/statuses/677900647560253442
forumswww.forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554
adamcaudillwww.adamcaudill.com/2015/12/17/much-ado-about-juniper/
cisawww.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv
webwww.web.nvd.nist.gov/view/vuln/detail
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08 Oct 2025 00:00Current
7.7High risk
Vulners AI Score7.7
CVSS 39.8
CVSS 210
EPSS0.614
ScreenOSauthentication flawremote attackeradministrator accesscrafted passwordtelnetsecure shell
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