CVE-2007-3923: Cisco Wide Area Application Services

High severity, CVSS 7.8. EPSS: 2% chance of exploitation in the next 30 days.

The Common Internet File System (CIFS) optimization in Cisco Wide Area Application Services (WAAS) 4.0.7 and 4.0.9, as used by Cisco WAE appliance and the NM-WAE-502 network module, when Edge Services are configured, allows remote attackers to cause a denial of service (loss of service) via a flood of TCP SYN packets to port (1) 139 or (2) 445.

Affected products

• Cisco Wide Area Application Services: version 4.0.7 only; version 4.0.9 only

Published 2007-07-21. Last modified 2026-06-16.