CVE-2019-1715

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Low-Entropy Keys Vulnerability

MEDIUM

5.3

CVSS Score

Published: May 3, 2019 at 04:20 PM UTC

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

13 products affected across 1 vendorSecure Firewall Threat DefenseAdaptive Security Appliance Device ManagerASA 5500

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Severity

MEDIUM5.3

Exploit prediction

EPSS 2%

SSVC

No known exploit

Description

A vulnerability in the Deterministic Random Bit Generator (DRBG), also known as Pseudorandom Number Generator (PRNG), used in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a cryptographic collision, enabling the attacker to discover the private key of an affected device. The vulnerability is due to insufficient entropy in the DRBG when generating cryptographic keys. An attacker could exploit this vulnerability by generating a large number of cryptographic keys on an affected device and looking for collisions with target devices. A successful exploit could allow the attacker to impersonate an affected target device or to decrypt traffic secured by an affected key that is sent to or from an affected target device.

Affected

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

Adaptive Security Appliance Device Manager · Cisco

95%

9.8 ≤ v < 9.8.49.9 ≤ v < 9.9.2.50

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-5500 (environment) · cisco-asa-5506-x (environment) · cisco-asa-5506h-x (environment) · cisco-asa-5506w-x (environment) · cisco-asa-5508-x (environment) · cisco-asa-5516-x (environment) · cisco-asa-5525-x (environment) · cisco-asa-5545-x (environment) · cisco-asa-5555-x (environment)

Secure Firewall Threat Defense · Cisco

95%

6.2.1 ≤ v < 6.2.3.126.3.0 ≤ v < 6.3.0.3

Adaptive Security Appliance · Cisco

60%

v < 9.8.4v < 9.9.2.50

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

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