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Cisco — Vulnerabilities & Security Advisories 3365

Browse all 3365 CVE security advisories affecting Cisco. AI-powered Chinese analysis, POCs, and references for each vulnerability.

Cisco Systems operates as a global leader in networking hardware, software, and telecommunications services, providing critical infrastructure for enterprise connectivity and cloud security. With over 3,000 recorded CVEs, the company’s attack surface is extensive, reflecting the complexity of its diverse product portfolio. Historically, vulnerabilities frequently involve remote code execution (RCE), cross-site scripting (XSS), and privilege escalation flaws, often stemming from legacy protocols or complex configuration interfaces. Notable incidents include the 2023 supply chain compromise affecting the Cisco AnyConnect Secure Mobility Client, which allowed attackers to bypass authentication mechanisms. These breaches highlight risks associated with widely deployed endpoint security agents. The sheer volume of disclosed issues underscores the challenges inherent in maintaining security across such a vast ecosystem of interconnected devices and software solutions, requiring rigorous patch management and continuous monitoring to mitigate potential exploitation by threat actors targeting critical network infrastructure.

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Top products by Cisco: Cisco Small Business RV Series Router Firmware Cisco IOS XE Software Cisco Identity Services Engine Software Cisco Adaptive Security Appliance (ASA) Software Cisco Firepower Management Center Cisco IOS XR Software Cisco Firepower Threat Defense Software Cisco NX-OS Software Cisco Data Center Network Manager Cisco SD-WAN vManage Cisco SD-WAN Solution Cisco Webex Meetings Cisco Unified Communications Manager Cisco Secure Firewall Adaptive Security Appliance (ASA) Software Cisco Prime Infrastructure Cisco Enterprise NFV Infrastructure Software IOS Cisco IOS Cisco Catalyst SD-WAN Manager Cisco WebEx WRF Player Cisco Digital Network Architecture Center (DNA Center) Cisco Email Security Appliance (ESA) Cisco Aironet Access Point Software Cisco RoomOS Software Cisco Unified Contact Center Express Cisco Unified Computing System (Managed) Cisco Secure Email Cisco Nexus Dashboard Cisco Application Policy Infrastructure Controller (APIC) Cisco Unity Connection
CVE ID Title CVSS Severity Published
CVE-2026-20121 CIsco FTD Bypass Access List — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-284 5.3 Medium 2026-09-16
CVE-2026-20120 Cisco FTD ACL bypass vulnerability — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-284 5.8 Medium 2026-09-16
CVE-2026-20248 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software TCP DNS Denial of Service Vulnerability — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-195 6.8 Medium 2026-09-16
CVE-2026-20333 Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Incorrect Comparison Vulnerabilities — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-697 8.8 High 2026-09-16
CVE-2026-20334 Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Coding Standards Vulnerabilities — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-710 8.4 High 2026-09-16
CVE-2026-20332 Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Improper Access Control Vulnerabilities — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-284 9.9 Critical 2026-09-16
CVE-2026-20154 Cisco Secure Firewall Adaptive Security Appliance Software and Secure Firewall Threat Defense Software Logging Denial of Service — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-835 8.6 High 2026-09-16
CVE-2026-20222 Cisco Secure Adaptive Security Appliance Software and Secure Firewall Threat Defense Software EIGRP Denial of Service Vulnerability — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-401 7.4 High 2026-09-16
CVE-2026-20336 Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Resource Lifetime Management Vulnerabilities — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-664 8.8 High 2026-09-16
CVE-2026-20249 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software IKEv2 Certificate Authentication Denial of Service Vulnerability — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-704 8.6 High 2026-09-16
CVE-2026-20335 Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Incorrect Calculation Vulnerabilities — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-682 8.1 High 2026-09-16
CVE-2026-20250 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software for Firepower 3100 and 4200 Series DTLS Denial of Service Vulnerability — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-772 8.6 High 2026-09-16
CVE-2026-20330 Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Improper Neutralization Vulnerabilities — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-707 9.9 Critical 2026-09-16
CVE-2026-20329 Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Exceptional Conditions Handling Vulnerabilities — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-703 9.9 Critical 2026-09-16
CVE-2026-20331 Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Protection Mechanism Failure Vulnerabilities — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-693 9.6 Critical 2026-09-16
CVE-2026-20349 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service Vulnerability — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-244 8.6 High 2026-08-11
CVE-2026-20025 Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 输入验证错误漏洞 — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-190 6.8 Medium 2026-03-04
CVE-2026-20024 Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 缓冲区错误漏洞 — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-119 6.8 Medium 2026-03-04
CVE-2026-20023 Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 缓冲区错误漏洞 — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-787 6.1 Medium 2026-03-04
CVE-2026-20022 Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏洞 — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-823 6.1 Medium 2026-03-04
CVE-2026-20021 Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏洞 — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-401 4.3 Medium 2026-03-04
CVE-2026-20020 Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 输入验证错误漏洞 — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-20 6.8 Medium 2026-03-04
CVE-2026-20073 Cisco Secure Firewall Adaptive Security Appliance Software and Cisco Secure Firewall Threat Defense Software Access Control List Bypass Vulnerability — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-284 5.8 Medium 2026-03-04
CVE-2026-20102 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software SAML Reflected Cross-Site Scripting Vulnerability — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-79 6.1 Medium 2026-03-04
CVE-2026-20070 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software VPN Web Services Cross-Site Scripting Vulnerability — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-80 6.1 Medium 2026-03-04
CVE-2026-20069 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software VPN Web Services Client-Side Request Smuggling Vulnerability — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-444 4.3 Medium 2026-03-04
CVE-2026-20082 Cisco Secure Firewall Adaptive Security Appliance 安全漏洞 — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-772 8.6 High 2026-03-04
CVE-2026-20062 Cisco Secure Firewall Adaptive Security Appliance 安全漏洞 — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-279 7.2 High 2026-03-04
CVE-2026-20049 Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏洞 — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-131 7.7 High 2026-03-04
CVE-2026-20015 Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏洞 — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CWE-401 5.8 Medium 2026-03-04

This page lists every published CVE security advisory associated with Cisco. Each entry links to a detailed page with CVSS scoring, CWE classification, affected products and references. AI-generated Chinese analysis is provided for fast triage.