CVE-2026-20273: Cisco IOS XE Software Security Hardening Release
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-20273?
CVE-2026-20273 has a high severity rating of 8.6.
How do I fix CVE-2026-20273?
To address CVE-2026-20273, users should apply the Cisco IOS XE Software Security Hardening Release.
What type of vulnerabilities does CVE-2026-20273 address?
CVE-2026-20273 addresses multiple internally discovered vulnerabilities within Cisco IOS XE software.
What is the impact of CVE-2026-20273?
The impact of CVE-2026-20273 includes potential denial of service due to a severity level of A:H in the vulnerability rating.
When was CVE-2026-20273 published?
CVE-2026-20273 was published on August 5, 2026.