CVE-2019-1696 Cisco Firepower Threat Defense Software SMB Protocol Preprocessor Detection Engine Denial of Service Vulnerabilities
Unauthenticated attackers can cause a denial of service in Cisco Firepower Threat Defense via the SMB protocol preprocessor detection engine.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-1696?
CVE-2019-1696 is a high-severity denial of service vulnerability in Cisco Secure Firewall Management Center, published on 3 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Multiple vulnerabilities in the Server Message Block (SMB) Protocol preprocessor detection engine for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, adjacent or remote attacker to cause a denial of service (DoS) condition. For more information about these vulnerabilities, see the Details section of this advisory.
Weakness: CWE-400
Which versions are affected by CVE-2019-1696?
It affects 2 products.
Products include Cisco Secure Firewall Management Center, Cisco Secure Firewall Threat Defense.
How do I fix CVE-2019-1696?
No fix has been published for CVE-2019-1696 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-1696 being exploited?
There is no known exploitation of CVE-2019-1696 in the wild and no public exploit code.
Other vulnerabilities in Cisco Secure Firewall Management Center
- CVE-2026-20079 Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel
- CVE-2026-20131 Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data
- CVE-2026-20316 Cisco Secure Firewall Management Center Use of Hard-coded Password
- CVE-2025-20265 Cisco Secure Firewall Management Center Software Radius Remote Code Execution Vulnerability
- CVE-2024-20424 Command injection in Cisco Firepower Management Center
Sources
Also known as GHSA-qvj5-5v4x-34r2.