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CVE-2024-20308

Cisco IOS XE - IKEv1

Cisco CVSS 8.6 Updated March 16, 2026

Executive Risk Summary

"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 underflow, resulting in an affected device reloading. This vulnerability can be triggered by IPv4 and IPv6 traffic, and a successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition."

Operational Audit Arsenal

Target Type Firmware Image
Target Asset Cisco IOS XE
Standard Path Global Firmware

Manual Verification Required

This is a non-Windows asset (Cisco). Use the target asset details and official path provided above to verify your current version against the official vendor advisories listed below.

Patch Impact Forecast

Reboot Required Likely

High

Internal Work Notes

CVE-2024-20308: Unauthenticated remote attacker can cause Cisco IOS XE device reload via IKEv1 fragmentation vulnerability, resulting in denial of service (DoS) condition. Verify device version and apply patch or upgrade to mitigate risk.

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Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.