cvedb.io
CVE-2021-1224
MEDIUM · CVSS 5.8
EPSS exploitation probability: 79%
Published 2021-01-13T22:15:20.410 · Last modified 2026-08-11T19:37:30.880

Summary

Multiple Cisco products are affected by a vulnerability with TCP Fast Open (TFO) when used in conjunction with the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect detection of the HTTP payload if it is contained at least partially within the TFO connection handshake. An attacker could exploit this vulnerability by sending crafted TFO packets with an HTTP payload through an affected device. A successful exploit could allow the attacker to bypass configured file policy for HTTP packets and deliver a malicious payload.

Affected products

cisco — secure_firewall_management_center

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.