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CVE-2024-20436

Cisco IOS XE - HTTP Server

Cisco CVSS 8.6 Updated March 16, 2026

Executive Risk Summary

"A vulnerability in the HTTP Server feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a null pointer dereference when accessing specific URLs, and an attacker could exploit this by sending crafted HTTP traffic to an affected device."

Operational Audit Arsenal

Target Type Firmware Image
Target Asset httpd
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

Network connectivity may be disrupted during the patching process

Internal Work Notes

CVE-2024-20436: Cisco IOS XE HTTP Server DoS vulnerability - verify version and apply patch to prevent remote denial of service attacks

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Intelligence Sources

Related Cisco Threats

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