CVE-2026-20272

CRITICAL · CVSS 9.8 · EPSS 0.34% · CWE CWE-74

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 software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20272 are related to issues with improper neutralization of special elements that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-74.

CVE-2026-20272 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 9.8; EPSS 0.3%).

4 products with CSAF evidence