CVE-2019-1694

Name: CVE-2019-1694
Creator: NVD / NIST
Published: 2019-05-03T15:29:01.04+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 2.52%

Last modified Jun 17, 2026

CVE-2019-1694 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A vulnerability in the TCP processing engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to the improper handling of TCP traffic. EPSS estimates a 2.52% chance of exploitation in the next 30 days.

Description

A vulnerability in the TCP processing engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to the improper handling of TCP traffic. An attacker could exploit this vulnerability by sending a specific sequence of packets at a high rate through an affected device. A successful exploit could allow the attacker to temporarily disrupt traffic through the device while it reboots.

Metrics

CVSS 3.1

8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability

2.52%

82.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Cisco	Adaptive Security Appliance Software	< 9.4.4.34
Cisco	Adaptive Security Appliance Software	>= 9.5, < 9.6.4.25
Cisco	Adaptive Security Appliance Software	>= 9.7, < 9.8.4
Cisco	Adaptive Security Appliance Software	>= 9.9, < 9.9.2.50
Cisco	Adaptive Security Appliance Software	>= 9.10, < 9.10.1.17
Cisco	Firepower Threat Defense	< 6.2.3.12
Cisco	Firepower Threat Defense	>= 6.3.0, < 6.3.0.3

References

http://www.securityfocus.com/bid/108160Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asa-frpwrtd-dosVendor Advisory
http://www.securityfocus.com/bid/108160Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asa-frpwrtd-dosVendor Advisory

Timeline

Published: May 3, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-1694?

How severe is CVE-2019-1694?

CVE-2019-1694 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 2.52% probability of exploitation in the next 30 days.

How do I fix CVE-2019-1694?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-1694?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST