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CVE Record

CVE-2021-27638: SAP 3D Visual Enterprise Viewer, version - 9, allows a user to open manipulated JT file received from untru...

SAP 3D Visual Enterprise Viewer, version - 9, allows a user to open manipulated JT file received from untrusted sources which results in crashing of the application and becoming temporarily unavailable until the user restarts the application, this is caused due to Improper Input Validation.

MediumCVSS 4.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

A user who opens a malicious JT 3D model file in SAP 3D Visual Enterprise Viewer can crash the application. The documented impact is temporary unavailability until the user restarts it. The sources do not indicate data theft, code execution, or system compromise.

Executive priority

Treat this as a moderate availability issue, not a high-impact breach scenario based on current sources. Prioritize it where engineering, manufacturing, or design teams rely on the viewer for time-sensitive work or routinely handle externally supplied JT files.

Technical view

CVE-2021-27638 is improper input validation in SAP 3D Visual Enterprise Viewer. The CVSS 3.0 vector is AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L, scoring 4.3. Exploitation requires user interaction and affects availability only.

Likely exposure

Exposure is limited to organizations using SAP 3D Visual Enterprise Viewer for JT file handling, especially where users receive or open JT files from external or untrusted sources. The source bundle lists SAP 3D Visual Enterprise Viewer versions below 9, while the description references version 9; confirm exact applicability with SAP Note 3059999.

Exploitation context

The source bundle does not show CISA KEV listing or other evidence of active exploitation. The plausible attack path is social delivery of a manipulated JT file to a user who opens it in the affected viewer, causing an application crash.

Researcher notes

Evidence is narrow: improper input validation, crafted JT input, user interaction required, and temporary application unavailability. The affected-version wording in the bundle is inconsistent with the title and description, so SAP Note 3059999 should be treated as the authority for exact version and remediation details.

Mitigation direction

  • Review SAP Note 3059999 and apply SAP-provided guidance where applicable.
  • Avoid opening JT files from untrusted or unsolicited sources.
  • Limit JT file handling to trusted workflows and validated senders.
  • Ensure affected viewer installations are inventoried and governed by endpoint software policy.

Validation and detection

  • Inventory systems with SAP 3D Visual Enterprise Viewer installed.
  • Confirm installed viewer versions against SAP Note 3059999.
  • Review whether business workflows require opening externally supplied JT files.
  • Check helpdesk or endpoint telemetry for repeated viewer crashes tied to JT files.
Prepared
Confidence
medium
Sources
4

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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CVE-2021-27638 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
Medium
CVSS
4.3 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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
3Source 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 3.0MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L2.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

4.3Medium
CVSS 3.0 vector shape for CVE-2021-27638Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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
SAP SESAP 3D Visual Enterprise Viewer< 9Listed
Weakness

CWE details

No CWE listed

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