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Cisco — Vulnerabilities & Security Advisories 3279

Browse all 3279 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.

CVE ID Title CVSS Severity Published
CVE-2026-20355 Cisco Secure Email S/MIME Ciphertext Decryption Vulnerabilty — Cisco Secure Email CWE-345 5.9 Medium 2026-09-02
CVE-2026-20354 Cisco Secure Email S/MIME Ciphertext Decryption Vulnerabilty — Cisco Secure Email CWE-354 5.9 Medium 2026-09-02
CVE-2026-20281 Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Denial of Service Vulnerability — Cisco Session Initiation Protocol (SIP) Software CWE-401 7.5 High 2026-09-02
CVE-2026-20278 Cisco IOS XR Software Security Hardening Release: September 2026 — Cisco IOS XR Software CWE-707 8.8 High 2026-09-02
CVE-2026-20280 Cisco IOS XR Software Security Hardening Release: September 2026 — Cisco IOS XR Software CWE-703 8.8 High 2026-09-02
CVE-2026-20279 Cisco IOS XR Software Security Hardening Release: September 2026 — Cisco IOS XR Software CWE-284 9.8 Critical 2026-09-02
CVE-2026-20275 Cisco IOS XR Software Security Hardening Release: September 2026 — Cisco IOS XR Software CWE-682 8.8 High 2026-09-02
CVE-2026-20274 Cisco IOS XR Software Security Hardening Release: September 2026 — Cisco IOS XR Software CWE-664 9.8 Critical 2026-09-02
CVE-2026-20276 Cisco IOS XR Software Security Hardening Release: September 2026 — Cisco IOS XR Software CWE-691 8.6 High 2026-09-02
CVE-2026-20277 Cisco IOS XR Software Security Hardening Release: September 2026 — Cisco IOS XR Software CWE-693 8.2 High 2026-09-02
CVE-2026-20212 Cisco Nexus 3000 and 9000 Series Switches Silicon One Hardware Abstraction Layer Remote Code Execution Vulnerability — Cisco NX-OS Software CWE-1327 9.8 Critical 2026-09-02
CVE-2026-20320 Cisco BroadWorks 输入验证错误漏洞 — Cisco BroadWorks CWE-611 7.5 High 2026-08-19
CVE-2026-20327 Cisco Unified Intelligence Center SQL Injection Vulnerability — Cisco Unified Intelligence Center CWE-89 6.5 Medium 2026-08-19
CVE-2026-20314 Cisco Packaged Contact Center Enterprise & Cisco Unified Contact Center Enterprise Server-Side Request Forgery Vulnerability — Cisco Packaged Contact Center Enterprise CWE-918 5.0 Medium 2026-08-19
CVE-2026-20319 Cisco Secure Workload Software Security Hardening Release August 2026 - Buffer Management Vulnerabilities — Cisco Secure Workload CWE-119 7.5 High 2026-08-19
CVE-2026-20315 Cisco Secure Workload Software Security Hardening Release August 2026 - Improper Access Control Vulnerabilities — Cisco Secure Workload CWE-284 10.0 Critical 2026-08-19
CVE-2026-20317 Cisco Secure Workload Software Security Hardening Release August 2026 - Improper Authentication Vulnerabilities — Cisco Secure Workload CWE-287 10.0 Critical 2026-08-19
CVE-2026-20318 Cisco Secure Workload Software Security Hardening Release August 2026 - Improper Input Validation Vulnerabilities — Cisco Secure Workload CWE-20 9.6 Critical 2026-08-19
CVE-2026-20359 Cisco Crosswork Security Hardening Release: August 2026 — Cisco Crosswork Planning CWE-522 9.9 Critical 2026-08-19
CVE-2026-20358 Cisco Crosswork Security Hardening Release: August 2026 — Cisco Crosswork Planning CWE-73 10.0 Critical 2026-08-19
CVE-2026-20357 Cisco Crosswork Security Hardening Release: August 2026 — Cisco Crosswork Planning CWE-306 10.0 Critical 2026-08-19
CVE-2026-20302 Cisco RoomOS Stack Overflow Vulnerability — Cisco RoomOS Software CWE-120 6.1 Medium 2026-08-19
CVE-2026-20231 Cisco Secure Workload Software Security Hardening Release August 2026 - Improper Neutralization of Special Elements Vulnerabilities — Cisco Secure Workload CWE-74 9.9 Critical 2026-08-19
CVE-2026-20232 Cisco Industrial Ethernet 1000 Series Switches Stored Cross-Site Scripting Vulnerability — Cisco Industrial Ethernet Switches CWE-80 5.4 Medium 2026-08-19
CVE-2026-20177 Cisco Industrial Ethernet 1000 Series Switches Denial of Service Vulnerability — Cisco Industrial Ethernet Switches CWE-770 5.3 Medium 2026-08-19
CVE-2026-20030 Cisco Crosswork Security Hardening Release: August 2026 — Cisco Crosswork Planning CWE-89 10.0 Critical 2026-08-19
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-2026-20348 ClamAV XAR File Format Processing Memory Corruption Vulnerability — Cisco Secure Endpoint CWE-120 7.5 High 2026-08-07
CVE-2026-20345 ClamAV GPT File Format Processing Memory Corruption Vulnerability — Cisco Secure Endpoint CWE-121 7.5 High 2026-08-07
CVE-2026-20339 ClamAV PESpin File Format Processing Integer Overflow Vulnerability — Cisco Secure Endpoint CWE-190 7.5 High 2026-08-07

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.