CVE-2019-1697: Cisco Adaptive Security Appliance Software

High severity, CVSS 7.5. EPSS: 2% chance of exploitation in the next 30 days.

A vulnerability in the implementation of the Lightweight Directory Access Protocol (LDAP) feature in Cisco Adaptive Security Appliance (ASA) Software and 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 vulnerabilities are due to the improper parsing of LDAP packets sent to an affected device. An attacker could exploit these vulnerabilities by sending a crafted LDAP packet, using Basic Encoding Rules (BER), to be processed by an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Affected products

• Cisco Adaptive Security Appliance Software: before 9.6.4.25 (fixed in 9.6.4.25); from 9.7, before 9.8.4 (fixed in 9.8.4); from 9.9, before 9.9.2.50 (fixed in 9.9.2.50); from 9.10, before 9.10.1.17 (fixed in 9.10.1.17)
• Cisco Secure Firewall Threat Defense: before 6.2.3.12 (fixed in 6.2.3.12); from 6.3.0, before 6.3.0.3 (fixed in 6.3.0.3)

Published 2019-05-03. Last modified 2026-08-11.