CVE-2015-7756

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.

Published: 2015-12-19 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-7756 is rated Moderate Risk (50.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.45%). EPSS rose +1.98% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2015-7756

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.46% 2.45% +1.98%
2 2026-03-14 0.41% 0.46% +0.05%
3 2026-03-13 — 0.41% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-7756

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2015-7756

Affected software / configurations for CVE-2015-7756

Vendor Product Version Raw CPE
juniper screenos 6.2.0r15 cpe:2.3:o:juniper:screenos:6.2.0r15:*:*:*:*:*:*:*
juniper screenos 6.2.0r16 cpe:2.3:o:juniper:screenos:6.2.0r16:*:*:*:*:*:*:*
juniper screenos 6.2.0r17 cpe:2.3:o:juniper:screenos:6.2.0r17:*:*:*:*:*:*:*
juniper screenos 6.2.0r18 cpe:2.3:o:juniper:screenos:6.2.0r18:*:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r12:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r14:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r15:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r16:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r17:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r18:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r19:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r20:*:*:*:*:*:*

References for CVE-2015-7756

cvelogic Threat Intelligence