Cisco IOS XE Software Easy Virtual Switching System Arbitrary Code Execution Vulnerability
Description
Easy VSS feature in Cisco IOS XE for Catalyst 4500 switches has a buffer overflow allowing unauthenticated remote code execution with root privileges.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Easy VSS feature in Cisco IOS XE for Catalyst 4500 switches has a buffer overflow allowing unauthenticated remote code execution with root privileges.
Vulnerability
The Easy Virtual Switching System (VSS) feature in Cisco IOS XE Software for Catalyst 4500 and 4500-X Series Switches contains a buffer overflow vulnerability due to incorrect boundary checks in protocol packet processing. This affects devices running vulnerable versions of Cisco IOS XE when the device is in a specific state. [1]
Exploitation
An unauthenticated, remote attacker can send crafted Easy VSS protocol packets to UDP port 5500 while the device is in a specific state, triggering a buffer overflow when processed. [1]
Impact
Successful exploitation allows the attacker to cause a denial of service or execute arbitrary code with root privileges on the underlying Linux operating system. [1]
Mitigation
Cisco has released software updates to address this vulnerability. No workarounds are available. [1]
AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
4- Range: n/a
Patches
0No patches discovered yet.
Vulnerability mechanics
No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.
References
1- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xe-evss-code-exe-8cw5VSvwmitrevendor-advisoryx_refsource_CISCO
News mentions
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