CVE-2021-34793: Improper Enforcement of Message Integrity During Transmission in a Communication Channel

🗓️ 27 Oct 2021 00:00:00Reported by Rapid7Type

rapid7🔗 www.rapid7.com👁 1 Views

Unauthenticated remote DoS in Cisco ASA and FTD TCP Normalizer via MAC table poisoning.

Reporter	Title	Published	Views	Family All 16
attackerkb	CVE-2021-34793	27 Oct 202116:00	–	attackerkb
BDU FSTEC	The vulnerability of the TCP Normalizer component of the microprogramming software for Cisco Adaptive Security Appliances (ASA) and Cisco Firepower Threat Defense (FTD) allows a attacker to cause a service failure.	1 Dec 202100:00	–	bdu_fstec
Circl	CVE-2021-34793	27 Oct 202122:16	–	circl
Cisco	Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability	27 Oct 202116:00	–	cisco
Tenable Nessus	Cisco Adaptive Security Appliance Software Transparent Mode DoS (cisco-sa-asa-ftd-dos-JxYWMJyL)	6 Jun 202200:00	–	nessus
Tenable Nessus	Cisco Firepower Threat Defense Software Transparent Mode DoS (cisco-sa-asa-ftd-dos-JxYWMJyL)	6 Jun 202200:00	–	nessus
CNNVD	Cisco Firepower Threat Defense（FTD）和Cisco Adaptive Security Appliances Software（ASA Software）安全漏洞	27 Oct 202100:00	–	cnnvd
CVE	CVE-2021-34793	27 Oct 202118:56	–	cve
Cvelist	CVE-2021-34793 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability	27 Oct 202118:56	–	cvelist
EUVD	EUVD-2021-21443	7 Oct 202500:30	–	euvd

Source	Link
nvd	www.nvd.nist.gov/vuln/detail/CVE-2021-34793
cwe	www.cwe.mitre.org/data/definitions/924.html
tools	www.tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL
tools	www.tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL

11 Aug 2026 00:00Current

5.9Medium risk

Vulners AI Score5.9

CVSS 3.18.6

CVSS 25

EPSS0.00582

SSVC

Cisco ASA Software Firepower Threat Defense Software TCP Normalizer DoS MAC address poisoning transparent mode