Cisco has implemented software hardening updates for its Catalyst SD-WAN Software following an internal security review that uncovered multiple critical vulnerabilities affecting the platform This article explores vulnerability class cwe. . Instead of issuing separate advisories for each bug, Cisco grouped the vulnerabilities under Common Weakness Enumeration (CWE) categories and assigned one CVE identifier per group, simplifying the disclosure and patching process for customers.
**Entity 2: Improper Link Resolution Before File Access** This class of bugs involves improperly resolving links before accessing files, allowing attackers to manipulate symbolic links to reach unintended locations.
CVE ID: Highest CVSS Score Vulnerability Class (CWE) Description CVE-2026-20303 9.9 CWE-20 Improper input validation (covers input validation, path traversal, and external path control) CVE-2026-20304 9.9 CWE-284 Improper access control (includes authorization, authentication, privileges, and bypasses) CVE-2026-20310 9.9 CWE-59 Improper link resolution before file access CVE-2026-20312 8.8 CWE-312 Cleartext storage of sensitive information CVE-2026-20313 7.7 CWE-1284 Improper validation of specified quantity in input The vulnerabilities impact Cisco Catalyst SD-WAN Software across all deployment models, including on-premises installations, Cisco SD-WAN Cloud-Pro, Cisco-managed SD-WAN Cloud environments, and Cisco SD-WAN for Government under FedRAMP.
Cisco has revealed that these vulnerabilities were identified through a blend of traditional internal testing methods and cutting-edge AI models, marking a new era in enterprise security research where AI plays a significant role in discovering flaws.
