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CVE Record

CVE-2021-1270: Cisco Data Center Network Manager Authorization Bypass Vulnerabilities

Multiple vulnerabilities in the web-based management interface of Cisco Data Center Network Manager (DCNM) could allow an authenticated, remote attacker to view, modify, and delete data without proper authorization. For more information about these vulnerabilities, see the Details section of this advisory.

MediumCVSS 6.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

A user who can authenticate to Cisco Data Center Network Manager could bypass authorization checks in its web management interface. That could let them view, change, or delete data they should not control. The issue is rated medium, but DCNM can administer sensitive data center network infrastructure.

Executive priority

Treat as a moderate-priority infrastructure management risk. Prioritize remediation where DCNM manages production data center networks or is accessible beyond tightly controlled admin paths.

Technical view

CVE-2021-1270 covers multiple authorization bypass flaws in Cisco DCNM’s web-based management interface. The CVSS 3.1 score is 6.3 with network access, low complexity, low privileges, no user interaction, and low confidentiality, integrity, and availability impact.

Likely exposure

Organizations running Cisco Data Center Network Manager with its web management interface reachable by authenticated users. The provided source bundle does not specify affected versions or deployment prerequisites beyond Cisco DCNM.

Exploitation context

The source bundle does not show CISA KEV listing or cite active exploitation. Exploitation requires authentication, but the CVSS vector indicates low complexity, remote network access, and no user interaction.

Researcher notes

Evidence supports authenticated authorization bypass only. The bundle lacks affected-version and fixed-release details, so validation should anchor on Cisco’s advisory and local DCNM version data. Do not assume unauthenticated access or public exploitation from these sources.

Mitigation direction

  • Review Cisco’s advisory to identify affected and fixed DCNM releases.
  • Apply Cisco-provided updates or workarounds when confirmed for your deployment.
  • Restrict DCNM web access to trusted administrative networks.
  • Review DCNM accounts and remove unnecessary or excessive privileges.

Validation and detection

  • Inventory Cisco DCNM instances and confirm web interface exposure.
  • Compare installed DCNM versions against Cisco’s advisory guidance.
  • Review audit logs for unauthorized data view, modify, or delete activity.
  • Verify only approved administrators can authenticate to DCNM.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

description · low confidence lookup

Privilege behavior lookup

The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-1270 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
6.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L2.83.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.3Medium
CVSS 3.1 vector shape for CVE-2021-1270Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
CiscoCisco Data Center Network Managern/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.