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    CVE-2026-20057

    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.

    Published:Mar 4, 2026
    Last Modified:Aug 20, 2026
    EPS:Mar 4, 2026
    EPSS Score:0.00432
    CVSS Score:5.8

    Affected Products

    Vendor
    Cisco
    Product
    Cisco Utd Snort Ips Engine Software
    Vendor
    Cisco
    Product
    Cyber Vision
    Vendor
    Cisco
    Product
    Secure Firewall Threat Defense
    Vendor
    Cisco
    Product
    Snort
    Vendor
    Cisco
    Product
    Unified Threat Defense Snort Intrusion Prevention System Engine

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-369 Divide By Zero

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-20068 (CVSS 5.8) — Multiple Cisco products are affected by a vulnerability in the Snort 3 detection engine that could allow an un…
    CVE-2026-20067 (CVSS 5.8) — Multiple Cisco products are affected by a vulnerability in the Snort 3 detection engine that could allow an un…
    CVE-2026-20066 (CVSS 5.8) — Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an un…
    CVE-2026-20065 (CVSS 5.8) — Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an un…
    CVE-2026-20058 (CVSS 5.8) — Multiple Cisco products are affected by vulnerabilities in the Snort 3 VBA feature that could allow an unauthe…
    CVE-2026-20054 (CVSS 5.8) — Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthe…
    CVE-2026-20053 (CVSS 5.8) — Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthe…
    CVE-2026-20005 (CVSS 5.8) — Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an un…
    CVE-2024-20508 (CVSS 5.8) — A vulnerability in Cisco Unified Threat Defense (UTD) Snort Intrusion Prevention System (IPS) Engine for Cisco…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High