CVE-2026-20067— Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability
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I. Basic Information for CVE-2026-20067
Vulnerability Information
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Vulnerability Title
Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Multiple Cisco products are affected by a vulnerability in the Snort 3 detection engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete error checking when parsing the Multicast DNS fields of the HTTP header. An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存写
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco IOS XE和Cisco Secure Firewall Threat Defense 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XE和Cisco Secure Firewall Threat Defense都是美国思科（Cisco）公司的产品。Cisco IOS XE是一个操作系统。用于企业有线和无线访问，汇聚，核心和WAN的单一操作系统，Cisco IOS XE降低了业务和网络的复杂性。Cisco Secure Firewall Threat Defense是一个集成式防火墙平台。 Cisco IOS XE和Cisco Secure Firewall Threat Defense存在缓冲区错误漏洞，该漏洞源于
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 Cyber Vision | 3.0.0 | - | |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.0 | - | |
| Cisco | Cisco UTD SNORT IPS Engine Software | 17.3.1a | - |
II. Public POCs for CVE-2026-20067
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|---|
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Same Patch Batch · Cisco · 2026-03-04 · 50 CVEs total
| CVE-2026-20079 | 10.0 CRITICAL | Cisco Secure Firewall Management Center 安全漏洞 |
| CVE-2026-20131 | 10.0 CRITICAL | Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability |
| CVE-2026-20039 | 8.6 HIGH | Cisco Adaptive Security Appliance and Firepower Threat Defense Software SSL VPN Authentica |
| CVE-2026-20082 | 8.6 HIGH | Cisco Secure Firewall Adaptive Security Appliance 安全漏洞 |
| CVE-2026-20103 | 8.6 HIGH | Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏 |
| CVE-2026-20101 | 8.6 HIGH | Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure FTD Software 安全特征问题漏洞 |
| CVE-2026-20002 | 8.1 HIGH | Cisco Secure Firewall Management Center SQL注入漏洞 |
| CVE-2026-20014 | 7.7 HIGH | Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏 |
| CVE-2026-20100 | 7.7 HIGH | Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏 |
| CVE-2026-20105 | 7.7 HIGH | Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏 |
| CVE-2026-20049 | 7.7 HIGH | Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏 |
| CVE-2026-20062 | 7.2 HIGH | Cisco Secure Firewall Adaptive Security Appliance 安全漏洞 |
| CVE-2026-20050 | 6.8 MEDIUM | Cisco Secure Firewall Threat Defense Decryption Policy Denial of Service Vulnerability |
| CVE-2026-20025 | 6.8 MEDIUM | Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 输入验 |
| CVE-2026-20024 | 6.8 MEDIUM | Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 缓冲区 |
| CVE-2026-20020 | 6.8 MEDIUM | Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 输入验 |
| CVE-2026-20064 | 6.5 MEDIUM | Cisco Secure Firewall Threat Defense 代码问题漏洞 |
| CVE-2026-20001 | 6.5 MEDIUM | Cisco Secure Firewall Management Center Software SQL Injection Vulnerabilities |
| CVE-2026-20070 | 6.1 MEDIUM | Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Softw |
| CVE-2026-20149 | 6.1 MEDIUM | Cisco Webex 跨站脚本漏洞 |
Showing top 20 of 50 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Cisco Cyber Vision
- CVE-2026-20068
Multiple Cisco Products Snort 3 TBD Denial of Service Vulner - CVE-2026-20057
Cisco Secure Firewall Threat Defense Software Snort 3 Visual - CVE-2026-20054
Cisco Secure Firewall Threat Defense Software Snort 3 Visual - CVE-2026-20053
Cisco Secure Firewall Threat Defense Software Snort 3 Visual - CVE-2025-20360
Multiple Cisco Products Snort 3 MIME Denial of Service Vulne
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
V. Comments for CVE-2026-20067
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