CVE-2019-1693

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN Denial of Service Vulnerability

MEDIUM

6.5

CVSS Score

Published: May 3, 2019 at 03:05 PM UTC

Updated: August 11, 2026 at 07:33 PM UTC

15 products affected across 1 vendorAdaptive Security ApplianceSecure Firewall Threat DefenseASA 5580

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Severity

MEDIUM6.5

Exploit prediction

EPSS 2%

SSVC

No known exploit

Description

A vulnerability in the WebVPN service of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper management of authenticated sessions in the WebVPN portal. An attacker could exploit this vulnerability by authenticating with valid credentials and accessing a specific URL in the WebVPN portal. A successful exploit could allow the attacker to cause the device to reload, resulting in a temporary DoS condition.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Adaptive Security Appliance · Cisco

95%

v < 9.10.1.17v < 9.4.4.34v < 9.6.4.25v < 9.8.4v < 9.9.2.509.10 ≤ v < 9.10.1.179.5 ≤ v < 9.6.4.259.7 ≤ v < 9.8.49.9 ≤ v < 9.9.2.50

Affected range stops below 9.10.1.17, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.4.4.34, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.6.4.25, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.8.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.9.2.50, so it looks safe — our inference, not a vendor statement

cisco-asa-5505 (environment) · cisco-asa-5510 (environment) · cisco-asa-5512-x (environment) · cisco-asa-5515-x (environment) · cisco-asa-5520 (environment) · cisco-asa-5525-x (environment) · cisco-asa-5540 (environment) · cisco-asa-5545-x (environment) · cisco-asa-5550 (environment) · cisco-asa-5555-x (environment) · cisco-asa-5580 (environment) · cisco-asa-5585-x (environment)

Secure Firewall Threat Defense · Cisco

95%

6.2.1 ≤ v < 6.2.3.126.3.0 ≤ v < 6.3.0.3

Firepower Threat Defense · Cisco

60%

v < 6.2.3.12v < 6.3.0.3

Affected range stops below 6.2.3.12, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.3.0.3, so it looks safe — our inference, not a vendor statement

ASA 5505 · Ciscodevice

80%

All versions

ASA 5510 · Ciscodevice