CVE-2026-20006
Medium · 5.8CVSS
5.8
EPSS
0.4%
Published
Mar 4, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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Related vulnerabilities
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- CVE-2016-8745 A bug in the error handling of the send file code for the NIO HTTP connector in Apache… CWE-388
- CVE-2016-10062 The ReadGROUP4Image function in coders/tiff.c in ImageMagick does not check the return… CWE-388
- CVE-2016-9588 arch/x86/kvm/vmx.c in the Linux kernel through 4.9 mismanages the #BP and #OF exceptions… CWE-388