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CVE Record

CVE-2021-1515: Cisco SD-WAN vManage Information Disclosure Vulnerability

A vulnerability in Cisco SD-WAN vManage Software could allow an unauthenticated, adjacent attacker to gain access to sensitive information. This vulnerability is due to improper access controls on API endpoints when Cisco SD-WAN vManage Software is running in multi-tenant mode. An attacker with access to a device that is managed in the multi-tenant environment could exploit this vulnerability by sending a request to an affected API endpoint on the vManage system. A successful exploit could allow the attacker to gain access to sensitive information that may include hashed credentials that could be used in future attacks.

MediumCVSS 4.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Cisco SD-WAN vManage could expose sensitive information in multi-tenant deployments. An attacker already adjacent to the environment through a managed device may be able to access data, including hashed credentials, which could support later attacks.

Executive priority

Treat as a targeted infrastructure risk, not a broad internet-scale emergency. Prioritize if Cisco SD-WAN vManage is used in multi-tenant mode or manages sensitive network environments.

Technical view

CVE-2021-1515 is an information disclosure issue in Cisco SD-WAN vManage Software. The cause is improper access controls on API endpoints when vManage runs in multi-tenant mode. CVSS 3.1 is 4.3 with adjacent attack vector and low confidentiality impact.

Likely exposure

Exposure appears limited to Cisco SD-WAN vManage deployments running multi-tenant mode, where an attacker has access to a device managed in that environment. The source bundle does not identify affected version ranges.

Exploitation context

The bundle does not cite active exploitation, and KEV is false. Exploitation requires adjacent positioning through a managed device in a multi-tenant vManage environment, with potential disclosure of sensitive information such as hashed credentials.

Researcher notes

The available evidence confirms CWE-284 improper access control and sensitive information exposure. Version and fix details are not present in the provided bundle, so validation should anchor on Cisco’s advisory and local deployment mode.

Mitigation direction

  • Check Cisco’s advisory for affected releases and fixed software guidance.
  • Prioritize review of multi-tenant Cisco SD-WAN vManage deployments.
  • Restrict access from managed devices to only required vManage API surfaces.
  • Monitor Cisco guidance for any updated remediation or workarounds.

Validation and detection

  • Inventory Cisco SD-WAN vManage instances and identify multi-tenant mode usage.
  • Confirm deployed vManage versions against Cisco’s advisory.
  • Review access paths from managed devices to vManage management services.
  • Assess whether exposed data could include reusable hashed credentials.
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

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cwe · medium confidence lookup

CWE-284: Authorization and privilege behavior lookup

Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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.

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cve · low confidence lookup

CVE-2021-1515 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.3 (3.1)
Known Exploited
No
Published

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

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
4.3CVSS 3.1MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N2.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.3Medium
CVSS 3.1 vector shape for CVE-2021-1515Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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 SD-WAN vManagen/aListed
Weakness

CWE details

CWE-284

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

CWE-284 · source CWE mapping

Improper Access Control

Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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