Adaptive Security Appliance Software vulnerabilities

Product

Adaptive Security Appliance Software

by Cisco · last CVE Aug 11, 2026

On CISA KEVExploited in the wildRansomware-linked

354

CVEs

On KEV

10.0

Max CVSS

New 30D

Vulnerabilities354 In the news8 Timeline

Severity mix

Critical 8High 106Medium 87Low 1

Severity

All severities354 Critical8 High106 Medium87 Low1

Exploitation

On CISA KEV14 Exploited in the wild14

Watch

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CVE	CVSS	EPSS	Published	Summary · affected versions
CVE-2016-6366 In wildKEV	8.8	88%	Aug 18	Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow Vulnerability Affected: 7.2.1 before 9.0.4.40; 9.1.1 before 9.1.7\(9\); 9.2.0 before 9.2.4\(14\); 9.3.0 before 9.3.3\(10\); 9.4.0.115 before 9.4.3\(8\); 9.5.0 through 9.5\(3\); +1 more
CVE-2026-20349 In wildKEV	8.6	1%	Aug 11	Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service Vulnerability Affected: 9.16.1; 9.16.1.28; 9.16.2; 9.16.2.3; 9.16.2.7; 9.16.2.11; +34 more
CVE-2025-20362 In wildKEV	8.6	87%	Sep 25	Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Missing Authorization Vulnerability Affected: 9.12 before 9.12.4.72; 9.14 before 9.14.4.28; 9.16 before 9.16.4.85; 9.17.0 before 9.18.4.67; 9.19 before 9.20.4.10; 9.22 before 9.22.2.14; +1 more
CVE-2024-20353 In wildKEV	8.6	70%	Apr 24	Cisco ASA and FTD Denial of Service Vulnerability Affected: 9.8.1; 9.8.1.5; 9.8.1.7; 9.8.2; 9.8.2.8; 9.8.2.14; +34 more
CVE-2016-6367 In wildKEV	7.8	23%	Aug 18	Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution Vulnerability Affected: 7.2.0 before 8.4\(3\); 8.5 before 9.0\(1\)
CVE-2020-3452 In wildKEV	7.5	100%	Jul 22	Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Read-Only Path Traversal Vulnerability Affected: 9.6 before 9.6.4.42; 9.8 before 9.8.4.20; 9.9 before 9.9.2.74; 9.10 before 9.10.1.42; 9.12 before 9.12.3.12; 9.13 before 9.13.1.10; +1 more
CVE-2020-3259 RansomwareIn wildKEV	7.5	72%	May 6	Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Information Disclosure Vulnerability Affected: 9.8 before 9.8.4.20; 9.9 before 9.9.2.67; 9.10 before 9.10.1.40; 9.12 before 9.12.3.9; 9.13 before 9.13.1.10
CVE-2018-0296 In wildKEV	7.5	100%	Jun 7	Cisco Adaptive Security Appliance (ASA) Denial-of-Service Vulnerability Affected: 9.1 before 9.1.7.29; 9.2 before 9.2.4.33; 9.3 before 9.4.4.18; 9.5 before 9.6.4.8; 9.7 before 9.7.1.24; 9.8 before 9.8.2.28; +1 more
CVE-2022-20759	8.8	29%	May 3	A vulnerability in the web services interface for remote access VPN features of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software… Affected: before 9.12.4.38; 9.13.0 before 9.14.4; 9.15.0 before 9.15.1.21; 9.16.0 before 9.16.2.14; 9.17.0 before 9.17.1.7
CVE-2019-1934	8.8	2%	Aug 7	A vulnerability in the web-based management interface of Cisco Adaptive Security Appliance (ASA) Software could allow an authenticated, remote attacker to elevate privileges and… Affected: through 8.2
CVE-2019-1713	8.8	1%	May 3	A vulnerability in the web-based management interface of Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to conduct a cross-site… Affected: before 9.4.4.34
CVE-2017-3807	8.8	15%	Feb 9	A vulnerability in Common Internet Filesystem (CIFS) code in the Clientless SSL VPN functionality of Cisco ASA Software, Major Releases 9.0-9.6, could allow an authenticated,… Affected: 7.0.1; 7.0.1.4; 7.0.2; 7.0.3; 7.0.4; 7.0.4.2; +34 more
CVE-2017-6607	8.7	2%	Apr 20	A vulnerability in the DNS code of Cisco ASA Software could allow an unauthenticated, remote attacker to cause an affected device to reload or corrupt the information present in… Affected: 9.0.1; 9.0.2; 9.0.2.10; 9.0.3; 9.0.3.6; 9.0.3.8; +34 more
CVE-2026-20012	8.6	0%	Mar 25	A vulnerability in the Internet Key Exchange version 2 (IKEv2) feature of Cisco IOS Software, Cisco IOS XE Software, Cisco Secure Firewall Adaptive Security Appliance (ASA)… Affected: 9.8.1; 9.8.1.5; 9.8.1.7; 9.8.2; 9.8.2.8; 9.8.2.14; +34 more
CVE-2026-20103	8.6	0%	Mar 4	A vulnerability in the Remote Access SSL VPN functionality of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software… Affected: 9.12.1 before 9.16.4.85; 9.17.1 before 9.18.4.66; 9.19.1 before 9.20.4; 9.22.1.1 before 9.22.2.4; 9.23.1 before 9.23.1.7
CVE-2026-20101	8.6	0%	Mar 4	A vulnerability in the SAML 2.0 single sign-on (SSO) feature of Cisco Secure Firewall ASA Software and Secure FTD Software could allow an unauthenticated, remote attacker to cause… Affected: 9.12.1 before 9.16.4.85; 9.17.1 before 9.18.4.66; 9.19.1 before 9.20.4; 9.22.1.1 before 9.22.2.4; 9.23.1 before 9.23.1.7
CVE-2026-20082	8.6	0%	Mar 4	A vulnerability in the handling of the embryonic connection limits in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote… Affected: 9.20.4.14 before 9.20.4.19
CVE-2026-20039	8.6	0%	Mar 4	A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an… Affected: 9.12.1 before 9.16.4.84; 9.17.1 before 9.18.4.57; 9.19.1 before 9.20.3.16; 9.22.1.1 before 9.22.2.4; 9.23.1 before 9.23.1.3
CVE-2025-20182	8.6	1%	May 7	A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol processing of Cisco Adaptive Security Appliance (ASA) Software, Cisco Firepower Threat Defense (FTD)… Affected: 9.8.1; 9.8.1.5; 9.8.1.7; 9.8.2; 9.8.2.8; 9.8.2.14; +34 more
CVE-2020-27124	8.6	1%	Nov 18	A vulnerability in the SSL/TLS handler of Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause the affected device to… Affected: 9.13.1.12; 9.13.1.13; 9.14.1.10
CVE-2024-20495	8.6	1%	Oct 23	A vulnerability in the Remote Access VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an… Affected: 9.8.4.12; 9.8.4.15; 9.8.4.17; 9.8.4.20; 9.8.4.22; 9.8.4.25; +34 more
CVE-2024-20494	8.6	1%	Oct 23	A vulnerability in the TLS cryptography functionality of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an… Affected: 9.19.1; 9.19.1.5; 9.19.1.9; 9.19.1.12; 9.19.1.18; 9.19.1.22; +11 more
CVE-2024-20426	8.6	1%	Oct 23	A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol for VPN termination of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense… Affected: 9.18.1; 9.18.1.3; 9.18.2; 9.18.2.5; 9.18.2.7; 9.18.2.8; +27 more
CVE-2024-20402	8.6	1%	Oct 23	A vulnerability in the SSL VPN feature for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated,… Affected: 9.8.1; 9.8.1.5; 9.8.1.7; 9.8.2; 9.8.2.8; 9.8.2.14; +34 more
CVE-2023-20095	8.6	1%	Nov 1	A vulnerability in the remote access VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an… Affected: 9.8.1; 9.8.1.5; 9.8.1.7; 9.8.2; 9.8.2.8; 9.8.2.14; +34 more
CVE-2023-20042	8.6	1%	Nov 1	A vulnerability in the AnyConnect SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an… Affected: 9.16.1; 9.16.1.28; 9.16.2; 9.16.2.3; 9.16.2.7; 9.16.2.11; +24 more
CVE-2023-20086	8.6	1%	Nov 1	A vulnerability in ICMPv6 processing of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote… Affected: 9.8.1; 9.8.1.5; 9.8.1.7; 9.8.2; 9.8.2.8; 9.8.2.14; +34 more
CVE-2022-20715	8.6	1%	May 3	A vulnerability in the remote access SSL VPN features of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an… Affected: before 9.8.4.44; 9.9 before 9.12.4.38; 9.13 before 9.14.4; 9.15 before 9.15.1.21; 9.16.0 before 9.16.2.14; 9.17.0 before 9.17.1.7
CVE-2021-34793	8.6	1%	Oct 27	A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in transparent mode could allow an… Affected: 9.9.0 before 9.12.4.29; 9.13.0 before 9.14.3.9; 9.15.0 before 9.15.1.17; 9.16.0 before 9.16.2.3
CVE-2020-3572	8.6	2%	Oct 21	A vulnerability in the SSL/TLS session handler of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an… Affected: 9.8.0 before 9.8.4.26; 9.9.0 before 9.9.2.80; 9.10.0 before 9.10.1.44; 9.12.0 before 9.12.4.4; 9.13.0 before 9.13.1.13; 9.14.0 before 9.14.1.19
CVE-2020-3436	8.6	2%	Oct 21	A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote… Affected: 9.8.0 before 9.8.4.25; 9.9.0 before 9.9.2.80; 9.10.0 before 9.10.1.44; 9.12.0 before 9.12.4.2; 9.13.0 before 9.13.1.12; 9.14.0 before 9.14.1.15
CVE-2020-3373	8.6	2%	Oct 21	A vulnerability in the IP fragment-handling implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an… Affected: 9.8.4.22; 9.8.4.25; 9.12.4.2; 9.12.4.3; 9.13.1.12; 9.14.1.15
CVE-2020-3304	8.6	4%	Oct 21	A vulnerability in the web interface of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote… Affected: 9.8.0 before 9.8.4.22; 9.9.0 before 9.9.2.80; 9.10.0 before 9.10.1.44; 9.12.0 before 9.12.3.12; 9.13.0 before 9.13.1.12; 9.14.0 before 9.14.1.10
CVE-2020-3196	8.6	2%	May 6	A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) handler of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense… Affected: 9.6 before 9.6.4.40; 9.8 before 9.8.4.20; 9.9 before 9.9.2.66; 9.10 before 9.10.1.37; 9.12 before 9.12.3.2; 9.13 before 9.13.1.7
CVE-2020-3191	8.6	2%	May 6	A vulnerability in DNS over IPv6 packet processing for Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated,… Affected: 9.6 before 9.6.4.36; 9.8 before 9.8.4.12; 9.9 before 9.9.2.66; 9.10 before 9.10.1.37; 9.12 before 9.12.2.9
CVE-2019-15256	8.6	2%	Oct 2	A vulnerability in the Internet Key Exchange version 1 (IKEv1) feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could… Affected: 9.7 before 9.8.4.10
CVE-2019-1714	8.6	2%	May 3	A vulnerability in the implementation of Security Assertion Markup Language (SAML) 2.0 Single Sign-On (SSO) for Clientless SSL VPN (WebVPN) and AnyConnect Remote Access VPN in… Affected: 9.7 before 9.8.4; 9.9 before 9.9.2.50; 9.10 before 9.10.1.17
CVE-2019-1708	8.6	2%	May 3	A vulnerability in the Internet Key Exchange Version 2 Mobility and Multihoming Protocol (MOBIKE) feature for the Cisco Adaptive Security Appliance (ASA) Software and Cisco… Affected: 9.8 through 9.8.4; 9.9 through 9.9.2.50; 9.10 through 9.10.1.17
CVE-2019-1706	8.6	1%	May 3	A vulnerability in the software cryptography module of the Cisco Adaptive Security Virtual Appliance (ASAv) and Firepower 2100 Series running Cisco Adaptive Security Appliance… Affected: 9.9 through 9.9.2.50
CVE-2019-1694	8.6	3%	May 3	A vulnerability in the TCP processing engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated,… Affected: before 9.4.4.34
CVE-2018-15388	8.6	2%	May 3	A vulnerability in the WebVPN login process of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated,… Affected: before 9.4.4.34
CVE-2018-15454	8.6	4%	Nov 1	A vulnerability in the Session Initiation Protocol (SIP) inspection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software… Affected: 9.4 before 9.4.4.27; 9.6 before 9.6.4.18; 9.8 before 9.8.3.16; 9.9 before 9.9.2.32; 9.10 before 9.10.1.2
CVE-2018-0240	8.6	4%	Apr 19	Multiple vulnerabilities in the Application Layer Protocol Inspection feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software… Affected: 9.6.0.0 before 9.6.4.6; 9.7.0.0 before 9.7.1.24; 9.8.0.0 before 9.8.2.24; 9.9.0.0 before 9.9.1.4
CVE-2018-0231	8.6	4%	Apr 19	A vulnerability in the Transport Layer Security (TLS) library of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an… Affected: 9.8(1); 98.1(1.154)
CVE-2018-0230	8.6	2%	Apr 19	A vulnerability in the internal packet-processing functionality of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series Security Appliances could allow an… Affected: 9.8(2)
CVE-2018-0228	8.6	4%	Apr 19	A vulnerability in the ingress flow creation functionality of Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to cause the CPU to increase… Affected: 9.1 before 9.1.7.20; 9.3 before 9.4.4.13; 9.5 before 9.6.3.17; 9.7 before 9.7.1.16; 9.8 before 9.8.2.14
CVE-2017-12246	8.6	7%	Oct 5	A vulnerability in the implementation of the direct authentication feature in Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to… Affected: 9.4(3); 9.7(1); 9.8(0.56)
CVE-2017-6608	8.6	5%	Apr 20	A vulnerability in the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) code of Cisco ASA Software could allow an unauthenticated, remote attacker to cause a reload… Affected: 9.0.1; 9.0.2; 9.0.2.10; 9.0.3; 9.0.3.6; 9.0.3.8; +34 more
CVE-2018-15465	8.1	2%	Dec 24	A vulnerability in the authorization subsystem of Cisco Adaptive Security Appliance (ASA) Software could allow an authenticated, but unprivileged (levels 0 and 1), remote attacker… Affected: before 9.4.4.29
CVE-2012-5010	8.1	1%	Jun 27	ASA 5515-X Adaptive Security Appliance Adaptive Security Appliance (ASA) Software 9.4.x before 9.4.1 Interim, 9.2.x before 9.2.4 Interim, ASA 5510 Adaptive Security Appliance… Affected: through 8.2\(4\)