🛡️ CVE-2024-20309
🟡 CVSS 5.6 — Medium ✅ No Known Exploit CWE-828 NVD
5.6
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A vulnerability in auxiliary asynchronous port (AUX) functions of Cisco IOS XE Software could allow an authenticated, local attacker to cause an affected device to reload or stop responding. This vulnerability is due to the incorrect handling of specific ingress traffic when flow control hardware is enabled on the AUX port. An attacker could exploit this vulnerability by reverse telnetting to the AUX port and sending specific data after connecting. A successful exploit could allow the attacker to cause the device to reset or stop responding, resulting in a denial of service (DoS) condition.

Details

Severity MEDIUM
CVSS Score 5.6
CVSS Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
CWE CWE-828
Public Exploit ✅ No
Source NVD
Published 2024-03-27
Updated 2026-06-02
Modified 2025-07-30
Fix URL N/A

Affected Packages

Software From version Fixed in
ios-xe — —

Similar Threats

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