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CVE-2022-20946
HIGH · CVSS 8.6
EPSS exploitation probability: 0%
Published 2022-11-15T21:15:35.317 · Last modified 2026-06-17T04:25:28.580

Summary

A vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to a memory handling error that occurs when GRE traffic is processed. An attacker could exploit this vulnerability by sending a crafted GRE payload through an affected device. A successful exploit could allow the attacker to cause the device to restart, resulting in a DoS condition. https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-gre-dos-hmedHQPM ["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-gre-dos-hmedHQPM"] This advisory

Affected products

cisco — firepower_threat_defense

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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.