CVE-2026-20006Disclosure(cisco / secure_firewall_threat_defense)

LOWCVSS 5.8 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

A vulnerability in the TLS cryptography functionality of the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to unexpectedly restart, resulting in a denial of service (DoS) condition. This vulnerability is due to improper implementation of the TLS protocol. An attacker could exploit this vulnerability by sending a crafted TLS packet to an affected system. A successful exploit could allow the attacker to cause a device that is running Cisco Secure FTD Software to drop network traffic, resulting in a DoS condition.  Note: TLS 1.3 is not affected by this vulnerability.

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0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tcp-dos-rHfqnwRg

Weakness type (CWE)

CWE-388

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

secure_firewall_threat_defense

Threat summary

1 mentions across 1 observed day

What's happening

Technical details provided in 1 signal
Disclosure: 1 classified signal
1 total mentions across 1 day

Affected systems

Vendors

cisco

Products

secure_firewall_threat_defense

33 versions affected across 1 product

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Disclosure

1100.0%

Referenced assets1 URL

By indicator

https://www.cve.org/CVERecord?id=CVE-2026-20006

Full discourse1 post

CVE@CVEnew217d
Disclosure
CVE-2026-20006 A vulnerability in the TLS cryptography functionality of the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenti… https://www.cve.org/CVERecord?id=CVE-2026-20006
Post summary
The text announces CVE-2026-20006, highlighting a TLS cryptography issue in Cisco Secure Firewall Threat Defense's Snort 3 Detection Engine, but contains no proof‑of‑concept, exploit code, active exploitation evidence, or patch details.
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56.6K followersView on X

CPE platform detail33 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

33 of 33 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	cisco	secure_firewall_threat_defense	7.2.0	-	-
App	cisco	secure_firewall_threat_defense	7.2.0.1	-	-
App	cisco	secure_firewall_threat_defense	7.2.1	-	-
App	cisco	secure_firewall_threat_defense	7.2.10	-	-
App	cisco	secure_firewall_threat_defense	7.2.10.2	-	-
App	cisco	secure_firewall_threat_defense	7.2.2	-	-
App	cisco	secure_firewall_threat_defense	7.2.3	-	-
App	cisco	secure_firewall_threat_defense	7.2.4	-	-
App	cisco	secure_firewall_threat_defense	7.2.4.1	-	-
App	cisco	secure_firewall_threat_defense	7.2.5	-	-
App	cisco	secure_firewall_threat_defense	7.2.5.1	-	-
App	cisco	secure_firewall_threat_defense	7.2.5.2	-	-
App	cisco	secure_firewall_threat_defense	7.2.6	-	-
App	cisco	secure_firewall_threat_defense	7.2.7	-	-
App	cisco	secure_firewall_threat_defense	7.2.8	-	-
App	cisco	secure_firewall_threat_defense	7.2.8.1	-	-
App	cisco	secure_firewall_threat_defense	7.2.9	-	-
App	cisco	secure_firewall_threat_defense	7.3.0	-	-
App	cisco	secure_firewall_threat_defense	7.3.1	-	-
App	cisco	secure_firewall_threat_defense	7.3.1.1	-	-
App	cisco	secure_firewall_threat_defense	7.3.1.2	-	-
App	cisco	secure_firewall_threat_defense	7.4.0	-	-
App	cisco	secure_firewall_threat_defense	7.4.1	-	-
App	cisco	secure_firewall_threat_defense	7.4.1.1	-	-
App	cisco	secure_firewall_threat_defense	7.4.2	-	-
App	cisco	secure_firewall_threat_defense	7.4.2.1	-	-
App	cisco	secure_firewall_threat_defense	7.4.2.2	-	-
App	cisco	secure_firewall_threat_defense	7.4.2.3	-	-
App	cisco	secure_firewall_threat_defense	7.4.2.4	-	-
App	cisco	secure_firewall_threat_defense	7.6.0	-	-
App	cisco	secure_firewall_threat_defense	7.6.1	-	-
App	cisco	secure_firewall_threat_defense	7.6.2	-	-
App	cisco	secure_firewall_threat_defense	7.6.2.1	-	-

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