Security readout for executives and security teams
Plain-English summary
Cisco DCNM could expose sensitive information to a logged-in local user. Even low-privilege access may be enough to read confidential data from local files, which could help the attacker gain higher privileges. This is not a remote unauthenticated issue in the provided evidence.
Executive priority
Treat this as a moderate priority unless DCNM hosts are shared, weakly controlled, or exposed to many operators. The main business risk is confidential data leakage that may support privilege escalation inside network management infrastructure.
Technical view
CVE-2020-3520 is an information disclosure flaw in Cisco Data Center Network Manager caused by insufficient protection of confidential information. CVSS 3.1 is 5.5: local attack vector, low complexity, low privileges, no user interaction, high confidentiality impact, no integrity or availability impact.
Likely exposure
Exposure is limited to Cisco Data Center Network Manager systems where an attacker already has local authenticated access. The provided bundle does not identify specific affected versions or deployment modes.
Exploitation context
The bundle does not cite active exploitation, and KEV status is false. Exploitation requires authenticated local access at any privilege level, reducing broad internet risk but increasing concern for shared admin hosts, compromised accounts, or weak local access controls.
Researcher notes
The source bundle confirms impact and attack prerequisites but does not provide affected version ranges, fixed releases, or workaround details. Avoid assuming exploit availability or patch levels beyond Cisco's advisory.
Mitigation direction
- Review Cisco's advisory for affected releases and fixed software guidance.
- Restrict local access to DCNM hosts to trusted administrators only.
- Audit low-privilege accounts and service accounts on DCNM systems.
- Monitor Cisco guidance for version-specific remediation details.
Validation and detection
- Inventory Cisco Data Center Network Manager installations.
- Compare deployed versions against Cisco's advisory once version details are available.
- Review who has local authenticated access to each DCNM host.
- Check for unusual local file access by low-privilege accounts.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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-2020-3520 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
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20200819 Cisco Data Center Network Manager 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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.