🛡️ CVE-2024-20307
🟡 CVSS 6.8 — Medium ✅ No Known Exploit CWE-121 NVD
6.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A vulnerability in the IKEv1 fragmentation code of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a heap overflow, resulting in an affected device reloading. This vulnerability exists because crafted, fragmented IKEv1 packets are not properly reassembled. An attacker could exploit this vulnerability by sending crafted UDP packets to an affected system. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: Only traffic that is directed to the affected system can be used to exploit this vulnerability. This vulnerability can be triggered by IPv4 and IPv6 traffic.

Details

Severity MEDIUM
CVSS Score 6.8
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE CWE-121
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
ios-xe

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