Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%

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.

CVE ID Title CVSS Severity Published
CVE-2021-34727 Cisco IOS XE SD-WAN Software Buffer Overflow Vulnerability — Cisco IOS XE SD-WAN Software CWE-120 9.8 Critical 2021-09-23
CVE-2021-34726 Cisco SD-WAN Software Command Injection Vulnerability — Cisco SD-WAN Solution CWE-77 6.7 - 2021-09-23
CVE-2021-34725 Cisco IOS XE SD-WAN Software Command Injection Vulnerability — Cisco IOS XE SD-WAN Software CWE-77 6.7 Medium 2021-09-23
CVE-2021-34724 Cisco IOS XE SD-WAN Software Privilege Escalation Vulnerability — Cisco IOS XE SD-WAN Software CWE-284 6.0 Medium 2021-09-23
CVE-2021-34705 Cisco IOS and IOS XE Software FXO Interface Destination Pattern Bypass Vulnerability — Cisco IOS CWE-232 5.3 Medium 2021-09-23
CVE-2021-34712 Cisco SD-WAN vManage Software Cypher Query Language Injection Vulnerability — Cisco SD-WAN vManage CWE-943 5.4 Medium 2021-09-23
CVE-2021-34714 Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability — Cisco IOS CWE-20 7.4 High 2021-09-23
CVE-2021-34723 Cisco IOS XE SD-WAN Software Arbitrary File Overwrite Vulnerability — Cisco IOS XE Software CWE-668 6.7 Medium 2021-09-23
CVE-2021-34703 Cisco IOS and IOS XE Software Link Layer Discovery Protocol Denial of Service Vulnerability — Cisco IOS CWE-456 6.8 Medium 2021-09-23
CVE-2021-34699 Cisco IOS and IOS XE Software TrustSec CLI Parser Denial of Service Vulnerability — Cisco IOS CWE-435 7.7 High 2021-09-23
CVE-2021-34697 Cisco IOS XE Software Protection Against Distributed Denial of Service Attacks Feature Vulnerability — Cisco IOS XE Software CWE-665 5.8 Medium 2021-09-23
CVE-2021-34696 Cisco ASR 900 and ASR 920 Series Aggregation Services Routers Access Control List Bypass Vulnerability — Cisco IOS XE Software CWE-284 5.8 Medium 2021-09-23
CVE-2021-1625 Cisco IOS XE Software Zone-Based Policy Firewall ICMP and UDP Inspection Vulnerability — Cisco IOS XE Software CWE-284 5.8 Medium 2021-09-23
CVE-2021-1624 Cisco IOS XE Software Rate Limiting Network Address Translation Denial of Service Vulnerability — Cisco IOS XE Software CWE-399 8.6 High 2021-09-23
CVE-2021-1623 Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers Simple Network Management Protocol Denial of Service Vulnerability — Cisco IOS XE Software CWE-399 7.7 High 2021-09-23
CVE-2021-1622 Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers Common Open Policy Service Denial of Service Vulnerability — Cisco IOS XE Software CWE-833 8.6 High 2021-09-23
CVE-2021-34786 Cisco BroadWorks CommPilot Application Software Vulnerabilities — Cisco BroadWorks CWE-620 6.5 Medium 2021-09-09
CVE-2021-34785 Cisco BroadWorks CommPilot Application Software Vulnerabilities — Cisco BroadWorks CWE-620 6.5 Medium 2021-09-09
CVE-2021-34771 Cisco IOS XR Software Unauthorized Information Disclosure Vulnerability — Cisco IOS XR Software CWE-201 5.5 Medium 2021-09-09
CVE-2021-34737 Cisco IOS XR Software DHCP Version 4 Server Denial of Service Vulnerability — Cisco IOS XR Software CWE-476 5.8 Medium 2021-09-09
CVE-2021-34728 Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerabilities — Cisco IOS XR Software CWE-78 7.8 High 2021-09-09
CVE-2021-34722 Cisco IOS XR Software Command Injection Vulnerabilities — Cisco IOS XR Software CWE-78 6.7 Medium 2021-09-09
CVE-2021-34721 Cisco IOS XR Software Command Injection Vulnerabilities — Cisco IOS XR Software CWE-78 6.7 Medium 2021-09-09
CVE-2021-34720 Cisco IOS XR Software IP Service Level Agreements and Two-Way Active Measurement Protocol Denial of Service Vulnerability — Cisco IOS XR Software CWE-771 8.6 High 2021-09-09
CVE-2021-34719 Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerabilities — Cisco IOS XR Software CWE-78 7.8 High 2021-09-09
CVE-2021-34718 Cisco IOS XR Software Arbitrary File Read and Write Vulnerability — Cisco IOS XR Software CWE-88 8.1 High 2021-09-09
CVE-2021-34713 Cisco IOS XR Software for ASR 9000 Series Routers Denial of Service Vulnerability — Cisco IOS XR Software CWE-399 7.4 High 2021-09-09
CVE-2021-34709 Cisco IOS XR Software for Cisco 8000 and Network Convergence System 540 Series Routers Image Verification Vulnerabilities — Cisco IOS XR Software CWE-347 6.0 Medium 2021-09-09
CVE-2021-34708 Cisco IOS XR Software for Cisco 8000 and Network Convergence System 540 Series Routers Image Verification Vulnerabilities — Cisco IOS XR Software CWE-347 6.0 Medium 2021-09-09
CVE-2021-34765 Cisco Nexus Insights Authenticated Information Disclosure Vulnerability — Cisco Nexus Insights CWE-552 4.3 Medium 2021-09-02

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.