CVE-2020-3516— Cisco IOS XE Software Web UI Improper Input Validation Vulnerability
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I. Basic Information for CVE-2020-3516
Vulnerability Information
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Vulnerability Title
Cisco IOS XE Software Web UI Improper Input Validation Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the web server authentication of Cisco IOS XE Software could allow an authenticated, remote attacker to crash the web server on the device. The vulnerability is due to insufficient input validation during authentication. An attacker could exploit this vulnerability by entering unexpected characters during a valid authentication. A successful exploit could allow the attacker to crash the web server on the device, which must be manually recovered by disabling and re-enabling the web server.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco IOS和IOS XE 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS和IOS XE都是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XE Software 存在输入验证错误漏洞，该漏洞源于系统没有对用户输入的特殊字符进行验证，攻击者可导致该Web 服务器崩溃。
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Cisco | Cisco IOS XE Software | n/a | - |
II. Public POCs for CVE-2020-3516
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-WEB-UI-exNFmcPOvendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2020-3516
Same Patch Batch · Cisco · 2020-09-24 · 52 CVEs total
| CVE-2020-3141 | 8.8 HIGH | Cisco IOS XE Software Privilege Escalation Vulnerabilities |
| CVE-2020-3425 | 8.8 HIGH | Cisco IOS XE Software Privilege Escalation Vulnerabilities |
| CVE-2020-3480 | 8.6 HIGH | Cisco IOS XE Software Zone-Based Firewall Denial of Service Vulnerabilities |
| CVE-2020-3399 | 8.6 HIGH | Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Denial of Se |
| CVE-2020-3421 | 8.6 HIGH | Cisco IOS XE Software Zone-Based Firewall Denial of Service Vulnerabilities |
| CVE-2020-3426 | 7.5 HIGH | Cisco IOS Software for Cisco Industrial Routers Virtual-LPWA Unauthorized Access Vulnera |
| CVE-2020-3465 | 7.4 HIGH | Cisco IOS XE Software Ethernet Frame Denial of Service Vulnerability |
| CVE-2020-3508 | 7.4 HIGH | Cisco IOS XE Software for Cisco ASR 1000 Series 20-Gbps Embedded Services Processor IP ARP |
| CVE-2020-3396 | 6.8 MEDIUM | Cisco IOS XE Software IOx Guest Shell USB SSD Namespace Protection Privilege Escalation Vu |
| CVE-2020-3417 | 6.8 MEDIUM | Cisco IOS XE Software Arbitrary Code Execution Vulnerability |
| CVE-2020-3513 | 6.7 MEDIUM | Cisco IOS XE Software for Cisco ASR 900 Series Route Switch Processor 3 Arbitrary Code Exe |
| CVE-2020-3416 | 6.7 MEDIUM | Cisco IOS XE Software for Cisco ASR 900 Series Route Switch Processor 3 Arbitrary Code Exe |
| CVE-2020-3479 | 6.1 MEDIUM | Cisco IOS and IOS XE Software MP-BGP EVPN Denial of Service Vulnerability |
| CVE-2020-3503 | 6.0 MEDIUM | Cisco IOS XE Software Guest Shell Unauthorized File System Access Vulnerability |
| CVE-2020-3393 | 6.0 MEDIUM | Cisco IOS XE Software IOx Application Hosting Privilege Escalation Vulnerability |
| CVE-2020-3423 | 5.1 MEDIUM | Cisco IOS XE Software Arbitrary Code Execution Vulnerability |
| CVE-2020-3475 | 4.3 MEDIUM | Cisco IOS XE Software Web Management Framework Vulnerabilities |
| CVE-2020-3474 | 4.3 MEDIUM | Cisco IOS XE Software Web Management Framework Vulnerabilities |
| CVE-2020-3407 | Cisco IOS XE Software RESTCONF and NETCONF-YANG Access Control List Denial of Service Vuln | |
| CVE-2020-3409 | Cisco IOS and IOS XE Software PROFINET Denial of Service Vulnerability |
Showing top 20 of 52 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same vendor: Cisco
- CVE-2026-20219
Cisco Slido 安全漏洞 - CVE-2026-20034
Cisco Unity Connection Remote Code Execution Vulnerability - CVE-2026-20035
Cisco Unity Connection Server-Side Request Forgery Vulnerabi - CVE-2026-20167
Cisco IoT Field Network Director Remote Device Denial of Ser - CVE-2026-20169
Cisco IoT Field Network Director Command Injection Vulnerabi
Same weakness: CWE-20
V. Comments for CVE-2020-3516
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