CVE-2020-3465— Cisco IOS XE Software Ethernet Frame Denial of Service Vulnerability
Quick assessment
Affected
Cisco Cisco IOS XE Software 16.8.1
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Cisco IOS和IOS XE都是美国思科（Cisco）公司的产品。CLI是其中的一个命令行界面。 Cisco IOS XE Software中存在安全漏洞，该漏洞源于对某些有效的但不是典型的以太网帧的不正确处理造成的，该漏洞允许攻击者可以通过将以太网帧发送到以太网段来利用此漏洞。
Possible ATT&CK Techniques 2 AI
T1499 · Endpoint Denial of Service T1499.002 · Service Exhaustion Flood
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2020-3465
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Cisco IOS XE Software Ethernet Frame Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a device to reload. The vulnerability is due to incorrect handling of certain valid, but not typical, Ethernet frames. An attacker could exploit this vulnerability by sending the Ethernet frames onto the Ethernet segment. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XE Software 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）公司的产品。CLI是其中的一个命令行界面。 Cisco IOS XE Software中存在安全漏洞，该漏洞源于对某些有效的但不是典型的以太网帧的不正确处理造成的，该漏洞允许攻击者可以通过将以太网帧发送到以太网段来利用此漏洞。
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 16.8.1 | n/a | - |
|
II. Public POCs for CVE-2020-3465
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2020-3465
请登录查看更多情报信息。
Vendor Advisories for CVE-2020-3465 (1)
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-le-drTOB625 vendor-advisory x_refsource_CISCO
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-2020-3421 | 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-2020-3426 | 7.5 HIGH | Cisco IOS Software for Cisco Industrial Routers Virtual-LPWA Unauthorized Access Vulnera |
| 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-2020-3416 | 6.7 MEDIUM | Cisco IOS XE Software for Cisco ASR 900 Series Route Switch Processor 3 Arbitrary Code Exe |
| CVE-2020-3513 | 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-2020-3393 | 6.0 MEDIUM | Cisco IOS XE Software IOx Application Hosting Privilege Escalation Vulnerability |
| CVE-2020-3503 | 6.0 MEDIUM | Cisco IOS XE Software Guest Shell Unauthorized File System Access Vulnerability |
| CVE-2020-3423 | 5.1 MEDIUM | Cisco IOS XE Software Arbitrary Code Execution Vulnerability |
| CVE-2020-3474 | 4.3 MEDIUM | Cisco IOS XE Software Web Management Framework Vulnerabilities |
| CVE-2020-3475 | 4.3 MEDIUM | Cisco IOS XE Software Web Management Framework Vulnerabilities |
| CVE-2020-3359 | Cisco IOS XE Software for Catalyst 9800 Series Wireless Controllers Multicast DNS Denial o | |
| CVE-2020-3390 | Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family SNMP Trap Denial of | |
| CVE-2020-3476 | Cisco IOS XE Software Arbitrary File Overwrite Vulnerability |
Showing top 20 of 52 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same vendor: Cisco
-
CVE-2026-76426
Cisco ISE REST API SQL Injection Vulnerability -
CVE-2026-20121
CIsco FTD Bypass Access List -
CVE-2026-76431
Cisco Identity Services Engine Arbitrary File Deletion Vulne -
CVE-2026-76427
Cisco ISE XML External Entity Injection Vulnerability -
CVE-2026-76447
Cisco Identity Services Engine Certificate Reload Vulnerabil
Same weakness: CWE-20
-
CVE-2026-82407
Klever-Go: Validator registration accepts an unvalidated BLS -
CVE-2026-95843
Moquette malformed shared subscriptions can crash command pr -
CVE-2026-62998
REDAXO: Unwhitelisted ORDER BY Column in rex_list Allows Aut -
CVE-2026-86679
Broken Access Control vulnerability -
CVE-2026-86683
Broken Authentication Vulnerability
V. Comments for CVE-2020-3465
No comments yet