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I. Basic Information for CVE-2026-20057
Vulnerability Information

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Vulnerability Title
Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.    This vulnerability is due to lack of proper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending a crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to unexpectedly restart causing a a denial of service (DoS) condition.
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
除零错误
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco IOS XE和Cisco Secure Firewall Threat Defense 数字错误漏洞
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存在数字错误漏洞,该漏洞源于解
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
VendorProductAffected VersionsCPESubscribe
CiscoCisco Cyber Vision 3.0.0 -
CiscoCisco Secure Firewall Threat Defense (FTD) Software 7.2.0 -
CiscoCisco UTD SNORT IPS Engine Software 17.12.1a -
II. Public POCs for CVE-2026-20057
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III. Intelligence Information for CVE-2026-20057
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IV. Related Vulnerabilities
V. Comments for CVE-2026-20057

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