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CVE-2017-6721
A vulnerability in the ingress processing of fragmented TCP packets by Cisco Wide Area Application Services (WAAS) could allow an…
Medium5.3EPSS 2.2%
- Published
- Updated
- Reserved
- Assigned by
- cisco
Description
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).
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
- EPSS (exploitation in 30 days)
- 2.2% · top 17% of all CVEs (4 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
- TCP Fragment Denial of Service Vulnerability
- CWE-20 (opens in a new tab)All about CWE-20 and its CVEs
Affected products
Cisco Wide Area Application Services
- affected Cisco Wide Area Application Services
References (3)
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170621-waas (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1038747 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 99200 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2017-6721)Record last updated .