PoC Index85,101 CVEs with PoCs

CVE-2026-20303

Cisco Catalyst SD-WAN Security Hardening Release - Input Validation Vulnerabilities

CRITICAL 9.9EPSS 0.5%

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
Cisco · Cisco Catalyst SD-WAN Controller · Cisco Catalyst SD-WAN Manager
CVSS v3.1 CISCO
9.9 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
0.49% chance of exploitation in the next 30 days, 41st percentile
Published
2026-08-05
Updated
2026-08-14

Proof-of-concept exploits (1)

References