CVE-2019-1695

Cisco Adaptive Security Appliance and Firepower Threat Defense Software Layer 2 Filtering Bypass Vulnerability

MEDIUM

6.5

CVSS Score

Published: May 3, 2019 at 03:10 PM UTC

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

7 products affected across 1 vendorAdaptive Security ApplianceSecure Firewall Threat DefenseFirepower 2140

Using Cisco Adaptive Security Appliance (ASA) Software by Cisco?

Get instant alerts when new vulnerabilities affect Cisco Adaptive Security Appliance (ASA) Software - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM6.5

Exploit prediction

EPSS 0.7%

SSVC

No known exploit

Description

A vulnerability in the detection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to send data directly to the kernel of an affected device. The vulnerability exists because the software improperly filters Ethernet frames sent to an affected device. An attacker could exploit this vulnerability by sending crafted packets to the management interface of an affected device. A successful exploit could allow the attacker to bypass the Layer 2 (L2) filters and send data directly to the kernel of the affected device. A malicious frame successfully delivered would make the target device generate a specific syslog entry.

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 < 9.8.4v < 9.9.2.509.10 ≤ v < 9.10.1.179.9 ≤ 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 9.8.4, 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-firepower-2110 (environment) · cisco-firepower-2120 (environment) · cisco-firepower-2130 (environment) · cisco-firepower-2140 (environment)

Secure Firewall Threat Defense · Cisco

95%

6.2.1 ≤ v < 6.2.3.126.3.0 ≤ v < 6.3.0.3

cisco-firepower-2110 (environment) · cisco-firepower-2120 (environment) · cisco-firepower-2130 (environment) · cisco-firepower-2140 (environment)

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

Firepower 2110 · Ciscodevice

80%

All versions

Firepower 2120 · Ciscodevice

80%

All versions

Firepower 2130 · Ciscodevice

80%

All versions

Firepower 2140 · Ciscodevice

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asa-ftd-bypass

References (2)

VDB Entryx_refsource_BIDThird Party Advisory

Source: [email protected]

http://www.securityfocus.com/bid/108173

Vendor Advisoryx_refsource_CISCO

Source: [email protected]

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asa-ftd-bypass

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUM[email protected]

Attack Vector: ADJACENT_NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: HIGH
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-284NVD-CWE-Other

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card