CVE-2019-1694 json
Cisco Adaptive Security Appliance Software and Cisco Firepower Threat Defense Software TCP Timer Handling Denial of Service Vulnerability
published 2019-05-03 7 y ago modified 2026-08-11 2 mo ago also EUVD-2019-10251
- cvss
- 8.6
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.5%
- EPSS 2.5% chance of exploitation in 30 days, percentile 85%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Cisco Cisco Adaptive Security Appliance (ASA) Software 9.4.4.34, 9.6.4.25, 9.8.4, 9.9.2.50, 9.10.1.17
- Cisco Cisco Firepower Threat Defense (FTD) Software 6.2.3.12, 6.3.0.3
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 23 mo ago
Exploit prediction
2.54% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 8.6 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| NVD | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| NVD | 2.0 | 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Affected products
- Cisco Cisco Adaptive Security Appliance (ASA) Software
- Cisco Cisco Firepower Threat Defense (FTD) Software
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
tools.cisco.com
/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asa-frpwrtd-dos
vendor-advisory
-
securityfocus.com
/bid/108160
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2019-1694
- NVD CVE-2019-1694
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.