What’s Vulnerable › Vulnerabilities

CVE-2017-6628

• Severity: medium (CVSS 6.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-05-03 · updated 2026-06-17
• Weakness: CWE-399

Description

A vulnerability in SMART-SSL Accelerator functionality for Cisco Wide Area Application Services (WAAS) 6.2.1, 6.2.1a, and 6.2.3a could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition where the WAN optimization could stop functioning while the process restarts. The vulnerability is due to a Secure Sockets Layer/Transport Layer Security (SSL/TLS) alert being incorrectly handled when in a specific SSL/TLS connection state. An attacker could exploit this vulnerability by establishing a SMART-SSL connection through the targeted device. The attacker would then send a crafted stream of SSL/TLS traffic. An exploit could allow the attacker to cause a DoS condition where WAN optimization could stop processing traffic for a short period of time. Cisco Bug IDs: CSCvb71133.

Affected products

• Cisco Wide Area Application Services: 6.2.1, 6.2.1a, 6.2.3a

References

• http://www.securityfocus.com/bid/98294
• http://www.securitytracker.com/id/1038399
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170503-waas
• http://www.securityfocus.com/bid/98294
• http://www.securitytracker.com/id/1038399
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170503-waas

Get alerted when CVE-2017-6628 or the next vulnerability affects your stack