Security readout for executives and security teams
Plain-English summary
This flaw lets an unauthenticated remote attacker read sensitive information from affected Cisco voice portal systems through improperly authenticated Java RMI listeners. It is not rated critical because the cited impact is limited to confidentiality, with no stated integrity or availability effect.
Executive priority
Handle as a moderate-priority confidentiality risk for voice infrastructure. It warrants inventory and vendor-guidance review, especially if systems are reachable from untrusted networks, but the provided evidence does not support emergency treatment.
Technical view
CVE-2020-3402 is a CWE-306 missing-authentication issue in the Java RMI interface of Cisco Unified Customer Voice Portal. Network access, low complexity, and no credentials or user interaction are required. Successful exploitation can disclose sensitive information from an affected device.
Likely exposure
Exposure is most relevant where Cisco Unified Customer Voice Portal or listed Cisco Unified IP IVR systems have reachable Java RMI listeners. The bundle does not identify specific affected versions or exposed ports.
Exploitation context
The provided sources do not state active exploitation, and the CVE is not listed as KEV. The advisory describes remote unauthenticated exploitation by crafted request but provides no public exploit-status evidence here.
Researcher notes
Key facts are source-limited: no affected version detail, fixed release detail, workaround detail, or exploit-in-the-wild evidence is included in the bundle. Validation should focus on product presence, RMI listener exposure, and Cisco advisory mapping.
Mitigation direction
- Review Cisco's advisory for affected releases, fixed software, and workaround status.
- Inventory Cisco Unified CVP and listed Unified IP IVR deployments.
- Identify systems exposing Java RMI listeners to untrusted networks.
- Prioritize vendor-recommended updates or configuration changes where applicable.
- Treat exposed voice infrastructure as sensitive until vendor guidance is confirmed.
Validation and detection
- Confirm whether Cisco Unified CVP or listed Unified IP IVR is deployed.
- Check product versions against Cisco's advisory.
- Review network exposure for Java RMI listener reachability.
- Look for unauthenticated access paths to affected listeners.
- Monitor logs for unexpected RMI access attempts.
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 lookupCVE-2020-3402 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
- 5.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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:N/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.3MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20200701 Cisco Unified Customer Voice Portal Information Disclosure 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.