CVE-2025-20311
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I. Basic Information for CVE-2025-20311
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the handling of certain Ethernet frames in Cisco IOS XE Software for Catalyst 9000 Series Switches could allow an unauthenticated, adjacent attacker to cause an egress port to become blocked and drop all outbound traffic. This vulnerability is due to improper handling of crafted Ethernet frames. An attacker could exploit this vulnerability by sending crafted Ethernet frames through an affected switch. A successful exploit could allow the attacker to cause the egress port to which the crafted frame is forwarded to start dropping all frames, resulting in a denial of service (DoS) condition.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
数据处理错误
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco IOS XE Software 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XE Software是美国思科（Cisco）公司的一种网络操作系统。 Cisco IOS XE Software存在代码问题漏洞，该漏洞源于对特制以太网帧处理不当，可能导致拒绝服务攻击。
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 | 16.6.1 | - |
II. Public POCs for CVE-2025-20311
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Cisco · 2025-09-24 · 17 CVEs total
| CVE-2025-20334 | 8.8 HIGH | Cisco IOS XE 命令注入漏洞 |
| CVE-2025-20315 | 8.6 HIGH | Cisco IOS XE 安全漏洞 |
| CVE-2025-20160 | 8.1 HIGH | Cisco IOS和Cisco IOS XE Software 授权问题漏洞 |
| CVE-2025-20327 | 7.7 HIGH | Cisco IOS 安全漏洞 |
| CVE-2025-20312 | 7.7 HIGH | Cisco IOS XE 安全漏洞 |
| CVE-2025-20352 | 7.7 HIGH | Cisco IOS和Cisco IOS XE Software 安全漏洞 |
| CVE-2025-20314 | 6.7 MEDIUM | Cisco IOS XE 安全漏洞 |
| CVE-2025-20313 | 6.7 MEDIUM | Cisco IOS XE 安全漏洞 |
| CVE-2025-20149 | 6.5 MEDIUM | Cisco IOS和Cisco IOS XE 安全漏洞 |
| CVE-2025-20240 | 6.1 MEDIUM | Cisco IOS XE Software 安全漏洞 |
| CVE-2025-20338 | 6.0 MEDIUM | Cisco IOS XE 安全漏洞 |
| CVE-2025-20339 | 5.8 MEDIUM | Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability |
| CVE-2025-20316 | 5.3 MEDIUM | Cisco IOS XE 访问控制错误漏洞 |
| CVE-2025-20293 | 5.3 MEDIUM | Cisco IOS XE Software 安全漏洞 |
| CVE-2025-20365 | 4.3 MEDIUM | Cisco Access Point Software 安全漏洞 |
| CVE-2025-20364 | 4.3 MEDIUM | Cisco Wireless LAN Controller 安全漏洞 |
IV. Related Vulnerabilities
Same vendor: Cisco
- CVE-2026-20219
Cisco Slido IDOR漏洞致用户隐私泄露 - 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
V. Comments for CVE-2025-20311
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