Advisoriesby IbisCiscoCVE-2026-20303
Cisco Catalyst SD-WAN: improper input validation
No fix yet
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20303 are related to improper input validation issues that are grouped under the Common Weakness Enumeration (CWE) CWE-20.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Cisco Catalyst SD-WAN Controller Product | <= 20.6.4 | No fix yet |
| <= 20.9.2 | No fix yet | |
| <= 20.3.6 | No fix yet | |
| <= 20.7.2 | No fix yet | |
| Cisco Catalyst SD-WAN Manager Product | <= 20.1.12 | No fix yet |
| <= 19.2.1 | No fix yet | |
| <= 18.4.4 | No fix yet | |
| <= 18.4.5 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-20