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The vulnerability of the Snort detection mechanism of Cisco Secure Firewall’s Threat Defense (FTD) allows a perpetrator to trigger a service failure.

🗓️ 13 Feb 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec🔗 bdu.fstec.ru👁 2 Views

Cisco Threat Defense Snort memory reclamation error enables remote attackers to trigger failure.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
Circl		CVE-2026-20026
7 Jan 202618:39
–circl
Cisco		Multiple Cisco Products Snort 3 Distributed Computing Environment/Remote Procedure Call Vulnerabilities
7 Jan 202616:00
–cisco
Tenable Nessus		Cisco Firepower Threat Defense (FTD) Software Multiple Vulnerabilities (cisco-sa-snort3-dcerpc-vulns-J9HNF4tH)
16 Jan 202600:00
–nessus
Tenable Nessus		Cisco IOS XE Software Unified Threat Defense Snort Intrusion Prevention System Engine Multiple Vulnerabilities (cisco-sa-snort3-dcerpc-vulns-J9HNF4tH)
16 Jan 202600:00
–nessus
Tenable Nessus		Cisco Meraki Multiple Vulnerabilities (cisco-sa-snort3-dcerpc-vulns-J9HNF4tH)
16 Jan 202600:00
–nessus
CNNVD		Cisco UTD SNORT IPS Engine Software和Cisco Secure Firewall Threat Defense Software 资源管理错误漏洞
7 Jan 202600:00
–cnnvd
CVE		CVE-2026-20026
7 Jan 202616:23
–cve
Cvelist		CVE-2026-20026 Multiple Cisco Products Snort 3 DCERPC Vulnerabilities
7 Jan 202616:23
–cvelist
EUVD		EUVD-2026-1192
7 Jan 202616:23
–euvd
NVD		CVE-2026-20026
7 Jan 202617:16
–nvd
Rows per page
Vulners
Node
cisco_systemssnortMatch3
OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.0.0
OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.0.0.1
OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.0.1
OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.0.1.1
OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.0.2
OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.0.2.1
OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.0.3
OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.0.4
OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.0.5
OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
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OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.4.2.3
OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.4.2.4
OR
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OR
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OR
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OR
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OR
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OR
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OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.7.10
OR
cisco_systemscisco_secure_firewall_threat_defense_(ftd)Match7.7.10.1

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13 Feb 2026 00:00Current
7.5High risk
Vulners AI Score7.5
CVSS 39.8
CVSS 210
EPSS0.00634
Cisco Secure FirewallThreat Defense Snortmemory reclamation errorremote attackerservice failure
2