Security readout for executives and security teams
Plain-English summary
This flaw can make affected Cisco virtual ASA or Firepower 2100 firewall devices unexpectedly reload, interrupting VPN or IPsec-dependent connectivity. It is remotely reachable and needs no login. The main business impact is availability loss, not data theft or tampering, based on the provided sources.
Executive priority
Treat as high priority for perimeter and VPN infrastructure because successful exploitation can interrupt access and site connectivity. It does not indicate confidentiality loss, but outage risk can be material for remote access, branch connectivity, and dependent services.
Technical view
CVE-2019-1706 is a logic error in the ASA Software cryptography module handling IPsec sessions. A remote unauthenticated attacker could trigger a denial of service by causing many IPsec sessions through an affected ASAv or Firepower 2100 running ASA Software. CVSS v3.0 is 8.6, with high availability impact.
Likely exposure
Exposure is most likely where Cisco ASAv or Firepower 2100 Series devices run ASA Software and process IPsec traffic. The source bundle lists affected versions as unspecified, so exact release exposure requires Cisco advisory confirmation.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. The described attack is network-reachable, low-complexity, unauthenticated, and availability-focused, which makes internet-facing or business-critical IPsec deployments higher priority.
Researcher notes
The provided CVE data identifies CWE-404 and a software cryptography module logic error tied to IPsec session handling. Affected version detail and official remediation specifics are not present in the bundle beyond the Cisco advisory reference, so avoid assuming exact vulnerable releases or workaround behavior.
Mitigation direction
- Review Cisco advisory for affected and fixed ASA Software releases.
- Apply Cisco-recommended updates or mitigations for the deployed release.
- Prioritize internet-facing and business-critical IPsec gateways.
- Escalate unsupported affected devices for vendor replacement or compensating guidance.
Validation and detection
- Inventory Cisco ASAv and Firepower 2100 ASA Software deployments.
- Identify assets processing IPsec traffic or VPN connectivity.
- Compare platform and release against Cisco advisory guidance.
- Review operational logs for unexpected reloads during IPsec-heavy periods.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-404: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2019-1706 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/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:L/PR:N/UI:N/S:C/C:N/I:N/A:H3.94Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.6HighVector: CVSS:3.0/AV:N/AC:L/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 IPsec 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 Resource Shutdown or Release
Improper Resource Shutdown or Release represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.