CVE-2026-20273

HIGH · CVSS 8.6 · EPSS 0.25% · CWE CWE-20

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20273 are related to improper input validation issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-20.

CVE-2026-20273 is confirmed by Cisco as affecting 4 products, including Cisco IOS XE Software, Cisco Adaptive Security Appliance (ASA) Software, and Cisco IOS XE Catalyst SD-WAN, and 1 more, via 1 advisory (CVSS 8.6; EPSS 0.3%).

4 products with CSAF evidence