Security readout for executives and security teams
Plain-English summary
CVE-2020-3267 affects Cisco Unified Contact Center Express. A logged-in agent could improperly change another agent’s availability state through the API. Business impact is operational disruption: call center staffing and routing could be affected, potentially causing denial of service for contact center workflows.
Executive priority
Treat this as a moderate operational-risk issue for contact centers. It is not described as unauthenticated or actively exploited, but disruption to agent availability can affect service levels and customer support operations. Prioritize remediation where Unified CCX supports business-critical queues.
Technical view
The issue is insufficient authorization enforcement in the Unified CCX API subsystem, classified as CWE-285. It requires network access and valid agent credentials, with no user interaction. Successful abuse affects integrity and availability by allowing unauthorized changes to agent availability state.
Likely exposure
Exposure is likely limited to organizations running Cisco Unified Contact Center Express where agent API access is reachable by authenticated users. The source bundle does not provide affected version ranges, so teams must compare deployed releases against Cisco’s advisory.
Exploitation context
The bundle does not cite CISA KEV listing or active exploitation. Public description indicates an authenticated remote attacker with valid agent credentials could abuse the API, but no source here confirms real-world exploitation.
Researcher notes
Evidence supports an authenticated improper authorization flaw with CVSS 3.0 score 5.4 and vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L. Affected versions and fixed releases are not included in the bundle beyond the Cisco advisory reference.
Mitigation direction
- Review Cisco’s advisory for affected releases and fixed software guidance.
- Upgrade or patch Unified CCX according to Cisco’s published remediation.
- Restrict Unified CCX API access to trusted networks and authorized users.
- Review agent account permissions and remove unnecessary access.
- Monitor for unusual or unauthorized agent availability changes.
Validation and detection
- Inventory all Cisco Unified CCX instances and deployed versions.
- Compare deployed versions with Cisco’s advisory applicability details.
- Confirm agent authentication is required and access is least privilege.
- Review audit logs for unexpected availability-state changes.
- Check whether API access is exposed beyond required networks.
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-285: 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-2020-3267 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
- 5.4 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
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:L/UI:N/S:U/C:N/I:L/A:L2.82.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.4MediumVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- 20200603 Cisco Unified Contact Center Express Improper API Authorization 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 Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.