CRITICAL 9.9 NVD

CVE-2026-20303

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive intern

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.

References

Published: 2026-08-05 · Source: NVD · Feed updated: 2026-08-05
This critical severity vulnerability with a CVSS score of 9.9 was published on 2026-08-05 via NVD.

Risk Timeline

CVE Disclosed2026-08-05 · -1 days ago

Remediation Resources

Official Advisory
sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/
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