Security readout for executives and security teams
This flaw can let a remote, unauthenticated attacker crash affected Cisco ASA or FTD security appliances, interrupting network connectivity. The sources describe denial of service rather than data theft or takeover. Business urgency depends on whether exposed firewall paths use the vulnerable TCP proxy functionality. Internet-facing or partner-facing ASA and FTD devices that proxy or inspect TCP traffic are the main concern. The bundle does not name specific vulnerable versions or full configuration prerequisites, so exposure must be confirmed against Cisco guidance and local device settings. Treat as a moderate availability risk for network edge infrastructure. Prioritize validation on internet-facing ASA or FTD devices and business-critical firewall clusters, then schedule vendor-directed remediation if affected. Mitigation focus: Review Cisco advisory for affected releases and vendor-recommended fixed software.; Upgrade ASA or FTD software where Cisco identifies vulnerable releases.; Reduce unnecessary exposure of TCP inspection paths from untrusted networks where feasible..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2019-1687 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H2.24Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.8MediumVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20190501 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software TCP Proxy Denial of Service VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.