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CVE Record

CVE-2020-3375: Cisco SD-WAN Solution Software Buffer Overflow Vulnerability

A vulnerability in Cisco SD-WAN Solution Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to information that they are not authorized to access, make changes to the system that they are not authorized to make, and execute commands on an affected system with privileges of the root user.

CriticalCVSS 9.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

CVE-2020-3375 is a critical Cisco SD-WAN software flaw that could let a remote unauthenticated attacker compromise an affected device. Cisco describes potential impact as unauthorized information access, unauthorized system changes, and command execution with root privileges.

Executive priority

Treat this as an urgent remediation item for any Cisco SD-WAN environment. The business risk is full device compromise, but prioritization should start with confirmed affected deployments because the source bundle lacks version details.

Technical view

The issue is a CWE-119 buffer overflow in Cisco SD-WAN Solution Software caused by insufficient input validation. Cisco states crafted traffic to an affected device could trigger the flaw. The provided affected product data identifies Cisco SD-WAN vManage, but does not include specific affected versions.

Likely exposure

Exposure is most relevant to organizations operating Cisco SD-WAN vManage or related Cisco SD-WAN Solution Software. The bundle does not provide affected release ranges, so teams must compare deployed versions directly against Cisco's advisory.

Exploitation context

The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. The vulnerability is still high urgency because it is network reachable, needs no authentication, and has root-level command execution impact according to Cisco's description.

Researcher notes

The public bundle supports critical severity and root-privileged impact, but does not include affected version ranges, fixed releases, exploit telemetry, or detection indicators. Analysis should stay tied to Cisco's advisory and avoid assuming broader Cisco products are affected.

Mitigation direction

  • Review Cisco's advisory for affected and fixed software details.
  • Inventory Cisco SD-WAN vManage and SD-WAN Solution Software deployments.
  • Prioritize vendor-approved updates or mitigations for exposed systems.
  • Reduce unnecessary reachability to affected management or SD-WAN services.
  • Track Cisco guidance for any revised affected-version information.

Validation and detection

  • Identify all Cisco SD-WAN vManage instances in the environment.
  • Compare deployed software versions with Cisco's advisory.
  • Confirm whether affected systems are reachable from untrusted networks.
  • Review change records for Cisco-recommended remediation completion.
  • Monitor Cisco and CVE records for updates to affected versions or exploitation evidence.
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.

cwe · low confidence lookup

CWE-119: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2020-3375 mapping review

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

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.8 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
9.8CVSS 3.0CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

9.8Critical
CVSS 3.0 vector shape for CVE-2020-3375Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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-119

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

CWE-119 · source CWE mapping

Improper Restriction of Operations within the Bounds of a Memory Buffer

Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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