Unrated severityNVD Advisory· Published Dec 19, 2015· Updated Jun 17, 2026
CVE-2015-7756
CVE-2015-7756
Description
The encryption implementation in 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 makes it easier for remote attackers to discover the plaintext content of VPN sessions by sniffing the network for ciphertext data and conducting an unspecified decryption attack.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
13cpe:2.3:o:juniper:screenos:6.2.0r15:*:*:*:*:*:*:*+ 12 more
- cpe:2.3:o:juniper:screenos:6.2.0r15:*:*:*:*:*:*:*
- cpe:2.3:o:juniper:screenos:6.2.0r16:*:*:*:*:*:*:*
- cpe:2.3:o:juniper:screenos:6.2.0r17:*:*:*:*:*:*:*
- cpe:2.3:o:juniper:screenos:6.2.0r18:*:*:*:*:*:*:*
- cpe:2.3:o:juniper:screenos:6.3.0:r12:*:*:*:*:*:*
- cpe:2.3:o:juniper:screenos:6.3.0:r14:*:*:*:*:*:*
- cpe:2.3:o:juniper:screenos:6.3.0:r15:*:*:*:*:*:*
- cpe:2.3:o:juniper:screenos:6.3.0:r16:*:*:*:*:*:*
- 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:*:*:*:*:*:*
- (no CPE)range: 6.2.0r15-6.2.0r18, 6.3.0r12-6.3.0r20
Patches
Vulnerability mechanics
References
8- kb.juniper.net/InfoCenter/indexnvdVendor Advisory
- arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/nvd
- www.forbes.com/sites/thomasbrewster/2015/12/18/juniper-says-it-didnt-work-with-government-to-add-unauthorized-code-to-network-gear/nvd
- www.kb.cert.org/vuls/id/640184nvd
- www.securitytracker.com/id/1034489nvd
- www.wired.com/2015/12/juniper-networks-hidden-backdoors-show-the-risk-of-government-backdoors/nvd
- adamcaudill.com/2015/12/17/much-ado-about-juniper/nvd
- forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554nvd
News mentions
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