Vulnerability Monitor

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CVE-2021-34753


A vulnerability in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured rules for ENIP traffic. This vulnerability is due to incomplete processing during deep packet inspection for ENIP packets. An attacker could exploit this vulnerability by sending a crafted ENIP packet to the targeted interface. A successful exploit could allow the attacker to bypass configured access control and intrusion policies that should trigger and drop for the ENIP packet.


Published

2024-11-15T17:15:10.303

Last Modified

2025-08-07T18:04:40.650

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 5.8 (MEDIUM)

Weaknesses
  • Type: Secondary
    CWE-284

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application cisco firepower_threat_defense_software < 6.4.0.13 Yes
Application cisco firepower_threat_defense_software < 6.6.5.1 Yes
Application cisco firepower_threat_defense_software < 6.7.0.3 Yes
Application cisco firepower_threat_defense_software 7.0.0 Yes

References