AEGLIX vulnerability intelligence
CVE-2015-7755
CRITICAL · CVSS 9.8 · Analyzed
Published: 2015-12-19 · Updated: 2026-06-17 · Source: NVD
Vulnerability overview
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.
Severity and scoring
- CVSS score
- 9.8 · CRITICAL
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-287
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Juniper · ScreenOS
- Added to catalog
- 2025-10-02
- 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.
- CISA remediation due date
- 2025-10-23
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:o:juniper:screenos:6.3.0:r17:*:*:*:*:*:*
cpe:2.3:o:juniper:screenos:6.3.0:r18:*:*:*:*:*:*
cpe:2.3:o:juniper:screenos:6.3.0:r19:*:*:*:*:*:*
cpe:2.3:o:juniper:screenos:6.3.0:r20:*:*:*:*:*:*
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- http://arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/
Third Party Advisory
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10713
Exploit · Vendor Advisory
- http://twitter.com/cryptoron/statuses/677900647560253442
Broken Link
- http://www.forbes.com/sites/thomasbrewster/2015/12/18/juniper-says-it-didnt-work-with-government-to-add-unauthorized-code-to-network-gear/
Permissions Required
- http://www.kb.cert.org/vuls/id/640184
Third Party Advisory
- http://www.securityfocus.com/bid/79626
Broken Link
- http://www.securitytracker.com/id/1034489
Broken Link
- http://www.wired.com/2015/12/juniper-networks-hidden-backdoors-show-the-risk-of-government-backdoors/
Third Party Advisory
- https://adamcaudill.com/2015/12/17/much-ado-about-juniper/
Third Party Advisory
- https://forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554
Vendor Advisory
- https://github.com/hdm/juniper-cve-2015-7755
Third Party Advisory
- http://arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/
Third Party Advisory
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10713
Exploit · Vendor Advisory
- http://twitter.com/cryptoron/statuses/677900647560253442
Broken Link
- http://www.forbes.com/sites/thomasbrewster/2015/12/18/juniper-says-it-didnt-work-with-government-to-add-unauthorized-code-to-network-gear/
Permissions Required
- http://www.kb.cert.org/vuls/id/640184
Third Party Advisory
- http://www.securityfocus.com/bid/79626
Broken Link
- http://www.securitytracker.com/id/1034489
Broken Link
- http://www.wired.com/2015/12/juniper-networks-hidden-backdoors-show-the-risk-of-government-backdoors/
Third Party Advisory
- https://adamcaudill.com/2015/12/17/much-ado-about-juniper/
Third Party Advisory
- https://forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554
Vendor Advisory
- https://github.com/hdm/juniper-cve-2015-7755
Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-7755
US Government Resource