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CVE-2026-20069— Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software VPN Web Services Client-Side Request Smuggling Vulnerability

CVSS 4.3 · Medium EPSS 0.01% · P1
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I. Basic Information for CVE-2026-20069

Vulnerability Information
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Vulnerability Title
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software VPN Web Services Client-Side Request Smuggling Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the VPN web services component of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct browser-based attacks against users of an affected device. This vulnerability is due to improper validation of HTTP requests. An attacker could exploit this vulnerability by persuading a user to visit a website that is designed to pass malicious HTTP requests to a device that is running Cisco Secure Firewall ASA Software or Cisco Secure FTD Software and has web services endpoints supporting VPN features enabled. A successful exploit could allow the attacker to reflect malicious input from the affected device to the browser that is in use and conduct browser-based attacks, including cross-site scripting (XSS) attacks. The attacker is not able to directly impact the affected device.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 环境问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense都是美国思科（Cisco）公司的产品。Cisco Secure Firewall Adaptive Security Appliance是一个企业级防火墙软件。Cisco Secure Firewall Threat Defense是一个集成式防火墙平台。 Cisco Secure Firewall Adaptive Security
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
CiscoCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3 -
CiscoCisco Secure Firewall Threat Defense (FTD) Software 6.4.0.1 -

II. Public POCs for CVE-2026-20069

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III. Intelligence Information for CVE-2026-20069

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Same Patch Batch · Cisco · 2026-03-04 · 50 CVEs total

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CVE-2026-200398.6 HIGHCisco Adaptive Security Appliance and Firepower Threat Defense Software SSL VPN Authentica
CVE-2026-200828.6 HIGHCisco Secure Firewall Adaptive Security Appliance 安全漏洞
CVE-2026-201038.6 HIGHCisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏
CVE-2026-201018.6 HIGHCisco Secure Firewall Adaptive Security Appliance和Cisco Secure FTD Software 安全特征问题漏洞
CVE-2026-200028.1 HIGHCisco Secure Firewall Management Center SQL注入漏洞
CVE-2026-200147.7 HIGHCisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏
CVE-2026-201007.7 HIGHCisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏
CVE-2026-201057.7 HIGHCisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏
CVE-2026-200497.7 HIGHCisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏
CVE-2026-200627.2 HIGHCisco Secure Firewall Adaptive Security Appliance 安全漏洞
CVE-2026-200506.8 MEDIUMCisco Secure Firewall Threat Defense Decryption Policy Denial of Service Vulnerability
CVE-2026-200256.8 MEDIUMCisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 输入验
CVE-2026-200246.8 MEDIUMCisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 缓冲区
CVE-2026-200206.8 MEDIUMCisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 输入验
CVE-2026-200646.5 MEDIUMCisco Secure Firewall Threat Defense 代码问题漏洞
CVE-2026-200016.5 MEDIUMCisco Secure Firewall Management Center Software SQL Injection Vulnerabilities
CVE-2026-200706.1 MEDIUMCisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Softw
CVE-2026-201496.1 MEDIUMCisco Webex 跨站脚本漏洞

Showing top 20 of 50 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
Same vendor: Cisco
Same weakness: CWE-444

V. Comments for CVE-2026-20069

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