Security readout for executives and security teams
Plain-English summary
Cisco DCNM may write sensitive information into a system log without proper masking. A low-privileged authenticated local user could read that log and learn confidential data. This is not remote unauthenticated compromise, but it matters for environments where DCNM handles sensitive network management information.
Executive priority
Treat as a moderate-priority confidentiality issue. Prioritize DCNM environments that manage sensitive network infrastructure or have broad local user access. Escalate if logs contain credentials, tokens, or operational secrets.
Technical view
CVE-2021-1283 affects the Cisco Data Center Network Manager logging subsystem. Sensitive data is not properly masked before being written to a restricted system log. Exploitation requires valid user credentials and local authenticated access. CVSS 3.1 is 5.5: local attack vector, low complexity, low privileges, high confidentiality impact.
Likely exposure
Exposure is limited to organizations running Cisco Data Center Network Manager with affected versions. The bundle does not provide exact affected or fixed version numbers, so teams must verify installed releases against Cisco’s advisory.
Exploitation context
No supplied source or KEV status indicates active exploitation. An attacker would need valid credentials and local access, then could inspect a sensitive log file. The main risk is confidential information disclosure, not integrity or availability impact.
Researcher notes
The source bundle confirms the vulnerability mechanics and CVSS vector, but does not include exact affected versions, log filename, fixed releases, or concrete indicators of exploitation. Avoid assuming exploitability beyond authenticated local log access.
Mitigation direction
- Review Cisco’s advisory for affected and fixed release guidance.
- Inventory all Cisco DCNM deployments and installed versions.
- Limit local access to DCNM hosts to trusted administrators.
- Audit DCNM user accounts and remove unnecessary access.
- Assess whether exposed log data requires credential rotation.
Validation and detection
- Confirm whether Cisco DCNM is deployed in the environment.
- Compare installed DCNM versions against Cisco’s advisory.
- Review administrative access paths to DCNM systems.
- Check whether sensitive data appears in relevant DCNM logs.
- Document compensating controls if immediate upgrade 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
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CWE-789: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-1283 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
- 20210120 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.
Memory Allocation with Excessive Size Value
Memory Allocation with Excessive Size Value represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.