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8.6highHigh

CVE-2021-34792

Cisco Secure Firewall Threat Defense

A vulnerability in the memory management of Cisco Adaptive Security Appliance (ASA) Software and 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 improper resource management when connection rates are high. An attacker could exploit this vulnerability by opening a significant number of connections on an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Exploitation status

  • A vendor advisory or patch reference has been published.

What the metrics mean

  • It is reachable over a network, without needing local access.
  • For an attacker who can reach it, no special conditions are needed to exploit it.
  • To exploit it, no account is needed.
  • Beyond that, no action by a user is required.

Scoring

CVSS
8.6 (v3.1)
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Weakness
CWE-400
Assigned by
psirt@cisco.com

Dates

Published
2021-10-27
Last modified
2026-08-11
Sources
NVD

Affected products

  • Cisco Secure Firewall Threat Defense6.4.0 - 6.4.0.13, 6.6.0 - 6.6.5, 6.7.0 - 6.7.0.3, 7.0.0 - 7.0.1
  • Cisco Adaptive Security Appliance Software9.8.0 - 9.8.4.40, 9.12.0 - 9.12.4.29, 9.14.0 - 9.14.3.9, 9.15.0 - 9.15.1.17, 9.16.0 - 9.16.2.3
  • Cisco Asa 5512-X Firmware009.014\(001.150\), 099.017\(001.211\), 099.017\(001.220\), 099.017\(015.050\)
  • Cisco Asa 5512-Xall versions
  • Cisco Asa 5505 Firmware009.014\(001.150\), 099.017\(001.211\), 099.017\(001.220\), 099.017\(015.050\)
  • Cisco Asa 5505all versions
  • Cisco Asa 5515-X Firmware009.014\(001.150\), 099.017\(001.211\), 099.017\(001.220\), 099.017\(015.050\)
  • Cisco Asa 5515-Xall versions
  • Cisco Asa 5525-X Firmware009.014\(001.150\), 099.017\(001.211\), 099.017\(001.220\), 099.017\(015.050\)
  • Cisco Asa 5525-Xall versions
  • Cisco Asa 5545-X Firmware009.014\(001.150\), 099.017\(001.211\), 099.017\(001.220\), 099.017\(015.050\)
  • Cisco Asa 5545-Xall versions

As listed in the NVD configuration data. Not a statement about your estate.

References