CVE-2017-6721: Cisco Wide Area Application Services

Medium severity, CVSS 5.3. EPSS: 2.2% chance of exploitation in the next 30 days.

A vulnerability in the ingress processing of fragmented TCP packets by Cisco Wide Area Application Services (WAAS) could allow an unauthenticated, remote attacker to cause the WAASNET process to restart unexpectedly, causing a denial of service (DoS) condition. More Information: CSCvc57428. Known Affected Releases: 6.3(1). Known Fixed Releases: 6.3(0.143) 6.2(3c)6 6.2(3.22).

Affected products

• Cisco Wide Area Application Services: version 6.3(1) only

Published 2017-07-04. Last modified 2026-06-17.