CVE-2015-6418

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-12-13 · updated 2026-06-17
Weakness: CWE-200

Description

The random-number generator on Cisco Small Business RV routers 4.x and SA500 security appliances 2.2.07 does not have sufficient entropy, which makes it easier for remote attackers to determine a TLS key pair via unspecified computations upon handshake key-exchange data, aka Bug ID CSCus15224.

Affected products

Cisco Rv016 Multi-Wan Vpn Firmware: 4.0.0.7, 4.0.2.8, 4.0.5.0
Cisco Rv042 Dual Wan Vpn Router Firmware: 4.0.2.8
Cisco Rv042G Dual Gigabit Wan Vpn Firmware: 4.0.0.7, 4.2.2.7, 4.2.2.8
Cisco Rv082 Dual Wan Vpn Router Firmware: 4.0.0.7, 4.0.2.8
Cisco Sa520: 2.2.07
Cisco Sa520W: 2.2.07
Cisco Sa540: 2.2.07

References

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151210-dwvr
http://www.securityfocus.com/bid/78876
http://www.securitytracker.com/id/1034408
http://www.securitytracker.com/id/1034409
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151210-dwvr
http://www.securityfocus.com/bid/78876
http://www.securitytracker.com/id/1034408
http://www.securitytracker.com/id/1034409

Get alerted when CVE-2015-6418 or the next vulnerability affects your stack