CVE-2019-12698: Cisco Adaptive Security Appliance

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

A vulnerability in the WebVPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause increased CPU utilization on an affected device. The vulnerability is due to excessive processing load for a specific WebVPN HTTP page request. An attacker could exploit this vulnerability by sending multiple WebVPN HTTP page load requests for a specific URL. A successful exploit could allow the attacker to increase CPU load on the device, resulting in a denial of service (DoS) condition, which could cause traffic to be delayed through the device.

Affected products

• Cisco Adaptive Security Appliance: before 9.6.4.31 (fixed in 9.6.4.31)
• Cisco Adaptive Security Appliance Software: from 9.7, before 9.8.4.9 (fixed in 9.8.4.9); from 9.9, before 9.9.2.56 (fixed in 9.9.2.56); from 9.10, before 9.10.1.30 (fixed in 9.10.1.30); from 9.12, before 9.12.2.9 (fixed in 9.12.2.9); from 9.13, before 9.13.1 (fixed in 9.13.1)
• Cisco Secure Firewall Threat Defense: before 6.2.3.15 (fixed in 6.2.3.15); from 6.3.0, before 6.3.0.5 (fixed in 6.3.0.5); from 6.4.0, before 6.4.0.6 (fixed in 6.4.0.6)

Published 2019-10-02. Last modified 2026-08-11.