Security readout for executives and security teams
Plain-English summary
Cisco Vision Dynamic Signage Director had REST API calls that did not require authentication. A remote attacker could access some API functions without credentials. The known impact is limited confidentiality and integrity exposure, with no availability impact stated in the source bundle.
Executive priority
Treat this as a moderate-priority exposure management issue. It does not indicate known active exploitation or service disruption, but unauthenticated API access can still create business risk if deployed systems are reachable from untrusted networks.
Technical view
CVE-2019-16004 is a CWE-306 missing-authentication flaw in Cisco Vision Dynamic Signage Director REST API endpoints. It is remotely reachable, low complexity, requires no privileges or user interaction, and has CVSS 3.0 score 6.5 with low confidentiality and integrity impact.
Likely exposure
Exposure is likely limited to organizations running Cisco Vision Dynamic Signage Director. Risk is higher if the product's management or API surface is reachable from the internet or untrusted networks. The source bundle does not identify affected version numbers.
Exploitation context
The source bundle and KEV status do not show active exploitation. The CVSS vector indicates network exploitation without credentials or user interaction, but the provided sources only state interaction with some API parts, not full compromise.
Researcher notes
Evidence is limited to the CVE record and Cisco advisory reference. The bundle does not provide affected version ranges, exploit evidence, or named fixes. Validation should focus on product presence, endpoint reachability, and Cisco advisory alignment.
Mitigation direction
- Review Cisco's advisory for affected and fixed release guidance.
- Inventory Cisco Vision Dynamic Signage Director deployments.
- Restrict API and management access to trusted networks where feasible.
- Prioritize remediation for internet-facing or broadly reachable deployments.
- Monitor for unexpected unauthenticated API access patterns.
Validation and detection
- Confirm whether Cisco Vision Dynamic Signage Director is deployed.
- Check deployed versions against Cisco's advisory guidance.
- Verify API or management endpoints are not internet-exposed.
- Review logs for unauthenticated API requests or abnormal API activity.
- Document compensating controls if immediate remediation is unavailable.
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-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-16004 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
- Medium
- CVSS
- 6.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
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:U/C:L/I:L/A:N3.92.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.5MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20200108 Cisco Vision Dynamic Signage Director Authentication Bypass 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.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.