Security readout for executives and security teams
Plain-English summary
This flaw lets a logged-in local attacker break out of a Cisco FTD instance container and gain root-level control in the host namespace. The main business risk is cross-instance impact: one compromised FTD instance could affect other running FTD instances or the Cisco FXOS host device.
Executive priority
Treat this as a high-priority infrastructure control issue where Cisco FTD multi-instance is used. It is not remotely exploitable from the source data, but a compromised or malicious local device user could escalate to host-level control and disrupt multiple security instances.
Technical view
Cisco FTD multi-instance has insufficient protections on a configuration file used during container startup. An authenticated local attacker with valid device credentials could modify that file and execute commands as root in the host namespace. CVSS 3.1 is 8.2 with changed scope and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure appears limited to Cisco Firepower Threat Defense Software deployments using the multi-instance feature. The bundle does not identify specific affected versions. Because exploitation requires authenticated local access and valid credentials, risk concentrates around privileged device users, compromised admin accounts, and shared multi-instance FXOS platforms.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not listed as KEV in the bundle. Exploitation is local and authenticated, but the impact is severe because successful escape reaches root privileges in the host namespace and can affect other FTD instances or the FXOS host.
Researcher notes
The weakness is mapped to CWE-216 and centers on insufficient protection of a container startup configuration file. The source bundle does not provide affected version ranges, patch names, exploit examples, or workaround details, so validation should rely on Cisco's advisory and local asset evidence.
Mitigation direction
- Check Cisco's advisory for affected releases, fixed software, and official workarounds.
- Inventory Cisco FTD deployments using the multi-instance feature.
- Limit and review accounts with local access to FTD instances.
- Monitor for unauthorized changes to container startup configuration files.
- Prioritize remediation on shared FXOS hosts running multiple FTD instances.
Validation and detection
- Confirm whether each Cisco FTD deployment uses the multi-instance feature.
- Compare installed FTD software versions against Cisco's advisory guidance.
- Review local privileged account lists and recent authentication activity.
- Check configuration integrity for unexpected container startup file changes.
- Assess whether other FTD instances share the same FXOS host.
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-216: 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 lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-3514 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
- 8.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/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:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H1.56Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.2HighVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20201021 Cisco Firepower Threat Defense Software Multi-Instance Container Escape 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.
DEPRECATED: Containment Errors (Container Errors)
DEPRECATED: Containment Errors (Container Errors) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.