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CVE-2026-20068— Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco Cyber Vision
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 Secure Firewall Threat Defense和Cisco IOS XE Software都是美国思科（Cisco）公司的产品。Cisco Secure Firewall Threat Defense是一个集成式防火墙平台。Cisco IOS XE Software是一种网络操作系统。 Cisco Secure Firewall Threat Defense和Cisco IOS XE Software存在安全漏洞，该漏洞源于解析远程过程调用数据时错误检查不完整，可能导致未经验证的

CVSS 5.8 · Medium EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2026-20068

Vulnerability Information
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Vulnerability Title
Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability
Source: CVE Program / CVE List V5
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 remote procedure call (RPC) data. An attacker could exploit this vulnerability by sending crafted RPC 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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Secure Firewall Threat Defense和Cisco IOS XE Software 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Secure Firewall Threat Defense和Cisco IOS XE Software都是美国思科（Cisco）公司的产品。Cisco Secure Firewall Threat Defense是一个集成式防火墙平台。Cisco IOS XE Software是一种网络操作系统。 Cisco Secure Firewall Threat Defense和Cisco IOS XE Software存在安全漏洞，该漏洞源于解析远程过程调用数据时错误检查不完整，可能导致未经验证的
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 7.2.4 -
Cisco Cisco UTD SNORT IPS Engine Software 17.3.1a -

II. Public POCs for CVE-2026-20068

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III. Intelligence Information for CVE-2026-20068

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Vendor Advisories for CVE-2026-20068 (1)

Same Patch Batch · Cisco · 2026-03-04 · 50 CVEs total

CVE-2026-20079 10.0 CRITICAL Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulner
CVE-2026-20131 10.0 CRITICAL Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability
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-2026-20082 8.6 HIGH Cisco Secure Firewall Adaptive Security Appliance 安全漏洞
CVE-2026-20039 8.6 HIGH Cisco Adaptive Security Appliance and Firepower Threat Defense Software SSL VPN Authentica
CVE-2026-20002 8.1 HIGH Cisco Secure Firewall Management Center SQL注入漏洞
CVE-2026-20049 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-2026-20100 7.7 HIGH Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏
CVE-2026-20014 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-2026-20020 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-2026-20025 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-2026-20022 6.1 MEDIUM Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏
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
Same vendor: Cisco
Same weakness: CWE-248

V. Comments for CVE-2026-20068

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