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CVE Record

CVE-2018-3900: An exploitable code execution vulnerability exists in the QR code scanning functionality of Yi Home Camera...

An exploitable code execution vulnerability exists in the QR code scanning functionality of Yi Home Camera 27US 1.8.7.0D. A specially crafted QR Code can cause a buffer overflow, resulting in code execution. An attacker can make the camera scan a QR code to trigger this vulnerability. Alternatively, a user could be convinced to display a QR code from the internet to their camera, which could exploit this vulnerability.

CriticalCVSS 9.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

CVE-2018-3900 affects Yi Home Camera 27US firmware 1.8.7.0D. A malicious QR code shown to the camera can trigger a buffer overflow and potentially run attacker-controlled code. The business risk is highest where these cameras remain deployed, unmanaged, or used in sensitive locations.

Executive priority

Treat this as a focused critical exposure, not a broad enterprise software emergency. Prioritize asset discovery and remediation if Yi Home Camera 27US devices are used in offices, customer areas, labs, homes, or other sensitive environments.

Technical view

The issue is in QR code scanning functionality. Talos and CVE sources describe a specially crafted QR code causing buffer overflow and code execution. The published CVSS v3.0 score is 9.1 critical with high confidentiality, integrity, and availability impact. The provided sources identify only Yi Home Camera 27US 1.8.7.0D as affected.

Likely exposure

Exposure is limited to organizations or consumers still running Yi Home Camera 27US firmware 1.8.7.0D, especially during setup or workflows where the camera scans QR codes. The bundle does not identify other Yi models or firmware versions as affected.

Exploitation context

The sources describe exploitation by making the camera scan a malicious QR code or convincing a user to show one from the internet. The CVE is not marked KEV, and the provided bundle does not show active exploitation in the wild.

Researcher notes

Evidence is narrow but serious: public sources name a QR parser buffer overflow leading to code execution in one firmware build. The bundle does not provide a confirmed patch version, affected-version range, CWE mapping, or exploitation-in-the-wild evidence.

Mitigation direction

  • Inventory Yi Home Camera 27US devices and firmware versions.
  • Check Yi or vendor guidance for fixed firmware or replacement advice.
  • Avoid scanning untrusted QR codes with affected cameras.
  • Isolate affected cameras from sensitive networks until remediated.
  • Retire unsupported affected devices if no maintained firmware is available.

Validation and detection

  • Confirm whether any deployed camera matches Yi Home Camera 27US 1.8.7.0D.
  • Review asset records, procurement data, and network inventories for Yi cameras.
  • Verify firmware state through approved administrative interfaces.
  • Do not validate by scanning unknown or crafted QR codes.
  • Track vendor advisories and CISA KEV status for changes.
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

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

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. 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-2018-3900 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
9.1 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/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
9.1CVSS 3.0CriticalCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H2.36Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

9.1Critical
CVSS 3.0 vector shape for CVE-2018-3900Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/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
YiYi TechnologyYi Technology Home Camera 27US 1.8.7.0DListed
Weakness

CWE details

No CWE listed

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