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CVE Record

CVE-2021-1464: Cisco SD-WAN vManage Authorization Bypass Vulnerability

A vulnerability in Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to bypass authorization checking and gain restricted access to the configuration information of an affected system. This vulnerability exists because the affected software has insufficient input validation for certain commands. An attacker could exploit this vulnerability by sending crafted requests to the affected commands of an affected system. A successful exploit could allow the attacker to bypass authorization checking and gain restricted access to the configuration data of the affected system.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

MediumCVSS 5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

An authenticated user of Cisco SD-WAN vManage could bypass authorization checks and view restricted configuration data. This is not described as remote code execution, but configuration exposure can support follow-on compromise. Cisco says updates are available and no workaround addresses the issue.

Executive priority

Prioritize in normal patch cycles, faster for internet-reachable or shared-admin SD-WAN management environments. The business concern is exposure of network configuration data that can help attackers understand or target the WAN environment.

Technical view

CVE-2021-1464 is a CWE-20 insufficient input validation flaw in Cisco SD-WAN vManage Software. Crafted requests to certain commands can bypass authorization checks. CVSS 3.1 is 5.0: network reachable, low complexity, low privileges required, no user interaction, changed scope, and low confidentiality impact.

Likely exposure

Exposure is most relevant where affected Cisco SD-WAN vManage or Cisco Catalyst SD-WAN Manager versions are deployed and accessible to non-admin authenticated users. Risk rises if the management interface is broadly reachable or if role separation is relied on to protect sensitive configuration data.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires authenticated remote access and crafted requests to affected commands. Evidence supports restricted configuration disclosure, not direct data modification, denial of service, or code execution.

Researcher notes

The record attributes the flaw to insufficient validation of certain commands. Public source detail is limited; do not infer vulnerable endpoints, payloads, or additional affected products. Validation should focus on version exposure, access boundaries, and Cisco advisory alignment.

Mitigation direction

  • Upgrade affected Cisco SD-WAN vManage deployments using Cisco's fixed software guidance.
  • Do not rely on a workaround; Cisco states none addresses this vulnerability.
  • Restrict vManage management access to trusted administrative networks and users.
  • Review least-privilege roles for accounts with vManage access.

Validation and detection

  • Inventory Cisco SD-WAN vManage or Catalyst SD-WAN Manager versions against the affected list.
  • Confirm deployed versions are covered by Cisco's software update guidance.
  • Review access logs for unusual authenticated requests involving restricted configuration data.
  • Check whether management interfaces are reachable outside intended admin paths.
Prepared
Confidence
high
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 · low confidence lookup

CWE-20: Exact CWE lookup

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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.

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cve · low confidence lookup

CVE-2021-1464 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N/RL:X/RC:X/E:X

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
10Source 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
5CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N/RL:X/RC:X/E:X3.11.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5Medium
CVSS 3.1 vector shape for CVE-2021-1464Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N/RL:X/RC:X/E:X

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 Catalyst SD-WAN Manager20.1.12, 19.2.1, 18.4.4, 18.4.5, 20.1.1.1, 20.1.1, 19.3.0, 19.2.2, 19.2.099, 18.3.6, 18.3.7, 19.2.0, 18.3.8, 19.0.0, 19.1.0, 18.4.302, 18.4.303, 19.2.097, 19.2.098, 17.2.10, 18.3.6.1, 19.0.1a, 18.2.0, 18.4.3, 18.4.1, 17.2.8, 18.3.3.1, 18.4.0, 18.3.1, 17.2.6, 17.2.9, 18.3.4, 17.2.5, 18.3.1.1, 18.3.5, 18.4.0.1, 18.3.3, 17.2.7, 17.2.4, 18.3.0, 18.4.501_ES, 18.4.6unknown
Weakness

CWE details

CWE-20

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

CWE-20 · source CWE mapping

Improper Input Validation

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

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