Security readout for executives and security teams
Plain-English summary
Cisco DNA Center had web interface XSS flaws that could let an outside attacker run script in an administrator's browser if that user clicks a crafted link. Business impact is mainly account/session abuse or browser-exposed data loss, not direct system takeover.
Executive priority
Treat this as a moderate-priority management-plane issue. It is not reported as actively exploited, but it targets administrator browser sessions and should be handled in normal security maintenance, faster if the interface is widely reachable.
Technical view
CVE-2020-3466 is CWE-79 in Cisco DNA Center's web-based management interface. Improper validation of user-supplied input enables unauthenticated remote XSS with required user interaction, changed scope, and low confidentiality and integrity impact. CVSS v3.0 score is 4.7.
Likely exposure
Organizations running Cisco DNA Center are relevant, especially where administrators access the management interface from browsers that can receive external links. The source bundle does not identify specific affected versions.
Exploitation context
No KEV listing or cited source indicates active exploitation. Exploitation requires persuading a user of the DNA Center interface to click a crafted link, which limits reliability but still matters for privileged administrators.
Researcher notes
The bundle confirms XSS behavior, CVSS, CWE, and affected product family. It does not provide affected version ranges, patch versions, or workaround text, so validation should rely on Cisco's advisory and local asset inventory.
Mitigation direction
- Review Cisco's advisory for affected releases and fixed software guidance.
- Prioritize remediation for internet-reachable or broadly reachable management interfaces.
- Restrict DNA Center management access to trusted administrative networks.
- Train administrators to avoid unsolicited links while logged into management tools.
- Monitor vendor guidance if exact version exposure is unclear.
Validation and detection
- Inventory all Cisco DNA Center deployments and software versions.
- Compare deployed versions against Cisco's advisory.
- Confirm the management interface is not broadly exposed.
- Review logs for suspicious administrator browser activity around the interface.
- Verify compensating access controls are enforced for management access.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2020-3466 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
- 4.7 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/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:H/PR:N/UI:R/S:C/C:L/I:L/A:N1.62.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
4.7MediumVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20200819 Cisco DNA Center Cross-Site Scripting VulnerabilitiesCVE 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.