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6.8mediumMedium

CVE-2021-40114

Cisco Secure Firewall Management Center

Multiple Cisco products are affected by a vulnerability in the way the Snort detection engine processes ICMP traffic that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper memory resource management while the Snort detection engine is processing ICMP packets. An attacker could exploit this vulnerability by sending a series of ICMP packets through an affected device. A successful exploit could allow the attacker to exhaust resources on the affected device, causing the device to reload.

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, exploitation depends on conditions outside the attacker's control.
  • To exploit it, no account is needed.
  • Beyond that, no action by a user is required.

Scoring

CVSS
6.8 (v3.1)
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Weakness
CWE-770
Assigned by
psirt@cisco.com

Dates

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

Affected products

  • Cisco Secure Firewall Management Center2.9.14.0, 2.9.15, 2.9.16, 2.9.17
  • Cisco Secure Firewall Threat Defense- 6.4.0.12, 6.5.0 - 6.6.3, 6.7.0 - 6.7.0.2
  • Cisco Unified Threat Defense16.12 - 16.12.6, 17.3 - 17.3.4a, 17.4 - 17.4.2
  • Snort Snort2.0.0 - 2.9.18

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

References