SF
Product
Secure Firewall Threat Defense
by Cisco · last CVE Aug 11, 2026
On CISA KEVExploited in the wildRansomware-linked
274
CVEs
11
On KEV
10.0
Max CVSS
0
New 30D
Severity mix
Critical 5High 138Medium 130Low 1
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CVECVSSEPSSPublishedSummary · affected versions
CVE-2026-20052
5.8
0%
Mar 4
Cisco Secure Firewall Threat Defense Software Snort 3 Memory Management Denial of Service Vulnerability
Affected: 7.4.0; 7.4.1; 7.4.1.1; 7.4.2; 7.4.2.1; 7.6.0
CVE-2026-20007
5.8
0%
Mar 4
Cisco Secure Firewall Threat Defense Software Snort Deep Inspection Bypass Vulnerability
Affected: 6.4.0; 6.4.0.1; 6.4.0.2; 6.4.0.3; 6.4.0.4; 6.4.0.5; +34 more
CVE-2026-20006
5.8
0%
Mar 4
Cisco Firepower Threat Defense Software and Cisco FirePOWER Services TLS with Snort 3 Denial of Service Vulnerability
Affected: 7.2.0; 7.2.0.1; 7.2.1; 7.2.2; 7.2.3; 7.2.4; +27 more
CVE-2026-20015
5.8
0%
Mar 4
A vulnerability in the IKEv2 feature of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, remote attacker to cause a DoS condition…
Affected: 7.2.0 before 7.2.11; 7.3.0 before 7.4.3; 7.6.0 before 7.6.4; 7.7.0 before 7.7.11
CVE-2026-20013
5.8
0%
Mar 4
A vulnerability in the IKEv2 feature of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, remote attacker to cause a DoS condition…
Affected: 7.2.0 before 7.2.11; 7.3.0 before 7.4.3; 7.6.0 before 7.6.4; 7.7.0 before 7.7.10
CVE-2026-20005
5.8
1%
Mar 4
Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine…
Affected: 7.6.0; 7.6.1; 7.6.2; 7.6.2.1; 7.7.0; 7.7.10; +1 more
CVE-2025-20224
5.8
1%
Aug 14
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD)…
Affected: 6.2.3; 6.2.3.1; 6.2.3.2; 6.2.3.3; 6.2.3.4; 6.2.3.5; +34 more
CVE-2024-20431
5.8
0%
Oct 23
A vulnerability in the geolocation access control feature of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass an access…
Affected: 7.0.0; 7.0.0.1; 7.0.1; 7.0.1.1; 7.0.2; 7.0.2.1; +26 more
CVE-2024-20407
5.8
0%
Oct 23
A vulnerability in the interaction between the TCP Intercept feature and the Snort 3 detection engine on Cisco Firepower Threat Defense (FTD) Software could allow an…
Affected: 6.2.3; 6.2.3.1; 6.2.3.2; 6.2.3.3; 6.2.3.4; 6.2.3.5; +34 more
CVE-2024-20384
5.8
0%
Oct 23
A vulnerability in the Network Service Group (NSG) feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an…
Affected: 7.0.0; 7.0.0.1; 7.0.1; 7.0.1.1; 7.0.2; 7.0.2.1; +32 more
CVE-2024-20299
5.8
0%
Oct 23
A vulnerability in the AnyConnect firewall for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated,…
Affected: 6.2.3; 6.2.3.1; 6.2.3.2; 6.2.3.3; 6.2.3.4; 6.2.3.5; +34 more
CVE-2024-20297
5.8
0%
Oct 23
A vulnerability in the AnyConnect firewall for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated,…
Affected: 6.2.3; 6.2.3.1; 6.2.3.2; 6.2.3.3; 6.2.3.4; 6.2.3.5; +34 more
CVE-2024-20363
5.8
0%
May 22
Multiple Cisco products are affected by a vulnerability in the Snort Intrusion Prevention System (IPS) rule engine that could allow an unauthenticated, remote attacker to bypass…
Affected: 7.4.0
CVE-2024-20293
5.8
0%
May 22
A vulnerability in the activation of an access control list (ACL) on Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow…
Affected: 7.3.0 through 7.4.0
CVE-2024-20261
5.8
0%
May 22
A vulnerability in the file policy feature that is used to inspect encrypted archive files of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote…
Affected: 6.2.3; 6.2.3.1; 6.2.3.2; 6.2.3.3; 6.2.3.4; 6.2.3.5; +34 more
CVE-2023-20071
5.8
1%
Nov 1
Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an…
Affected: before 6.4.0.17; 6.5.0 before 7.0.6; 7.1.0 before 7.2.4; 7.3.0 before 7.3.1.2; 6.7.0 before 7.0.5; 7.1.0 before 7.1.0.3; +1 more
CVE-2023-20270
5.8
1%
Nov 1
A vulnerability in the interaction between the Server Message Block (SMB) protocol preprocessor and the Snort 3 detection engine for Cisco Firepower Threat Defense (FTD) Software…
Affected: 7.1.0; 7.1.0.1; 7.1.0.2; 7.1.0.3; 7.2.0; 7.2.0.1; +6 more
CVE-2023-20256
5.8
1%
Nov 1
Multiple vulnerabilities in the per-user-override feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an…
Affected: 6.2.3.16; 6.2.3.17; 6.2.3.18; 6.4.0.10; 6.4.0.11; 6.4.0.12; +34 more
CVE-2023-20245
5.8
0%
Nov 1
Multiple vulnerabilities in the per-user-override feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an…
Affected: 6.2.3.3; 6.2.3.4; 6.2.3.5; 6.2.3.6; 6.2.3.7; 6.2.3.8; +34 more
CVE-2022-20943
5.8
1%
Nov 15
Multiple vulnerabilities in the Server Message Block Version 2 (SMB2) processor of the Snort detection engine on multiple Cisco products could allow an unauthenticated, remote…
Affected: 7.0.0; 7.0.0.1; 7.0.1; 7.0.1.1
CVE-2022-20928
5.8
1%
Nov 15
A vulnerability in the authentication and authorization flows for VPN connections in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software…
Affected: 6.1.0; 6.1.0.1; 6.1.0.2; 6.1.0.3; 6.1.0.4; 6.1.0.5; +34 more
CVE-2020-3565
5.8
1%
Oct 21
A vulnerability in the TCP Intercept functionality of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured Access…
Affected: before 6.4.0.8; 6.5.0 before 6.5.0.4; 6.5.0.5 before 6.6.0
CVE-2020-3299
5.8
2%
Oct 21
Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured File Policy for…
Affected: 6.0.0 before 6.3.0.1
CVE-2020-3285
5.8
1%
May 6
A vulnerability in the Transport Layer Security version 1.3 (TLS 1.3) policy with URL category functionality for Cisco Firepower Threat Defense (FTD) Software could allow an…
Affected: 6.4.0 through 6.4.0.8
CVE-2019-1981
5.8
1%
Nov 5
A vulnerability in the normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center…
Affected: All versions, or not specified
CVE-2019-1978
5.8
9%
Nov 5
A vulnerability in the stream reassembly component of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center…
Affected: All versions, or not specified
CVE-2019-1691
5.8
2%
Feb 21
Cisco Firepower Threat Defense Software SSL or TLS Denial of Service Vulnerability
Affected: before 6.2.3.4
CVE-2018-0297
5.8
1%
May 17
A vulnerability in the detection engine of Cisco Firepower Threat Defense software could allow an unauthenticated, remote attacker to bypass a configured Secure Sockets Layer…
Affected: 6.0.0; 6.1.0; 6.2.0; 6.2.2
CVE-2018-0244
5.8
1%
Apr 19
A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass a configured file action policy to drop the…
Affected: before 6.2.3
CVE-2018-0243
5.8
1%
Apr 19
A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass a configured file action policy that is…
Affected: before 6.2.3
CVE-2026-20024
5.7
0%
Mar 4
A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an authenticated, adjacent attacker to cause an affected…
Affected: 6.4.0; 6.4.0.1; 6.4.0.2; 6.4.0.3; 6.4.0.4; 6.4.0.5; +34 more
CVE-2026-20020
5.7
0%
Mar 4
A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected…
Affected: 6.4.0; 6.4.0.1; 6.4.0.2; 6.4.0.3; 6.4.0.4; 6.4.0.5; +34 more
CVE-2020-3352
5.5
0%
Oct 21
A vulnerability in the CLI of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to access hidden commands
Affected: before 6.3.0.6; 6.4.0 before 6.4.0.10; 6.5.0 before 6.5.0.5; 6.6.0 before 6.6.1
CVE-2023-20031
5.4
0%
Nov 1
A vulnerability in the SSL/TLS certificate handling of Snort 3 Detection Engine integration with Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated,…
Affected: 6.7.0; 6.7.0.1; 6.7.0.2; 6.7.0.3; 7.0.0; 7.0.0.1; +9 more
CVE-2026-20106
5.3
0%
Mar 4
A vulnerability in the Remote Access SSL VPN, HTTP management and MUS functionality, of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat…
Affected: 6.4.0 before 7.0.9; 7.1.0 before 7.2.11; 7.3.0 before 7.4.3; 7.6.0 before 7.6.4; 7.7.0 before 7.7.11
CVE-2021-34753
5.3
1%
Nov 15
A vulnerability in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote…
Affected: before 6.4.0.13; 6.5.0 before 6.6.5.1; 6.7.0 before 6.7.0.3; 7.0.0
CVE-2024-20493
5.3
1%
Oct 23
A vulnerability in the login authentication functionality of the Remote Access SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat…
Affected: 6.2.3; 6.2.3.1; 6.2.3.2; 6.2.3.3; 6.2.3.4; 6.2.3.5; +34 more
CVE-2024-20388
5.3
1%
Oct 23
A vulnerability in the password change feature of Cisco Firepower Management Center (FMC) software could allow an unauthenticated, remote attacker to determine valid user names on…
Affected: 6.4.0.4; 6.4.0.10; 6.4.0.12; 6.4.0.14; 6.4.0.16; 6.4.0.18; +7 more
CVE-2023-20267
5.3
0%
Nov 1
A vulnerability in the IP geolocation rules of Snort 3 could allow an unauthenticated, remote attacker to potentially bypass IP address restrictions
Affected: 6.7.0 through 7.3.1.1
CVE-2023-20246
5.3
1%
Nov 1
Multiple Cisco products are affected by a vulnerability in Snort access control policies that could allow an unauthenticated, remote attacker to bypass the configured policies on…
Affected: 7.0.0 through 7.3.1.1
CVE-2022-20950
5.3
1%
Nov 15
A vulnerability in the interaction of SIP and Snort 3 for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3…
Affected: 7.2.0; 7.2.0.1
CVE-2022-20940
5.3
1%
Nov 15
A vulnerability in the TLS handler of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to gain access to sensitive information
Affected: 6.2.3 through 6.2.3.18; 6.3.0 through 6.3.0.5; 6.4.0 through 6.4.0.14; 6.5.0 through 6.5.0.5; 6.7.0 through 6.7.0.3; 7.0.0 through 7.0.3; +11 more
CVE-2022-20748
5.3
1%
May 3
A vulnerability in the local malware analysis process of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service…
Affected: 7.0.0
CVE-2021-34794
5.3
1%
Oct 27
A vulnerability in the Simple Network Management Protocol version 3 (SNMPv3) access control functionality of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower…
Affected: 6.4.0 before 6.4.0.13; 6.5.0 before 6.6.5; 6.7.0 before 6.7.0.1
CVE-2021-34791
5.3
1%
Oct 27
Multiple vulnerabilities in the Application Level Gateway (ALG) for the Network Address Translation (NAT) feature of Cisco Adaptive Security Appliance (ASA) Software and Firepower…
Affected: before 6.4.0.12; 6.5.0 before 6.6.5; 6.7.0 before 6.7.0.2
CVE-2021-34790
5.3
1%
Oct 27
Multiple vulnerabilities in the Application Level Gateway (ALG) for the Network Address Translation (NAT) feature of Cisco Adaptive Security Appliance (ASA) Software and Firepower…
Affected: before 6.4.0.12; 6.5.0 before 6.6.5; 6.7.0 before 6.7.0.2
CVE-2021-34787
5.3
1%
Oct 27
A vulnerability in the identity-based firewall (IDFW) rule processing feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software…
Affected: before 6.4.0.13; 6.5.0 before 6.6.5; 6.7.0 before 6.7.0.3; 7.0.0 before 7.0.1
CVE-2021-1495
5.3
2%
Apr 29
Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for…
Affected: before 6.4.0.12; 6.5.0 before 6.6.4; 6.7.0 before 6.7.0.2
CVE-2021-1236
5.3
2%
Jan 13
Multiple Cisco products are affected by a vulnerability in the Snort application detection engine that could allow an unauthenticated, remote attacker to bypass the configured…
Affected: before 6.5.0.5
CVE-2021-1224
5.3
2%
Jan 13
Multiple Cisco products are affected by a vulnerability with TCP Fast Open (TFO) when used in conjunction with the Snort detection engine that could allow an unauthenticated,…
Affected: before 6.7.0
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