CVE-2021-27639Network attack vector

Application crash via malformed JT file

Published Jun 9, 2021 · Updated Aug 3, 2024

Improper input validation in SAP 3D Visual Enterprise Viewer before 9 allows remote attackers to crash it through a crafted JT file. The JT-file processing path fails to validate untrusted file contents adequately before opening them, causing the viewer process to terminate. A user must open the crafted file; the interruption lasts until the application is restarted and does not affect confidentiality or integrity.

CVSS severity4.3
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper input validation in SAP 3D Visual Enterprise Viewer before 9 allows remote attackers to crash it through a crafted JT file. The JT-file processing path fails to validate untrusted file contents adequately before opening them, causing the viewer process to terminate. A user must open the crafted file; the interruption lasts until the application is restarted and does not affect confidentiality or integrity.

The record

CVE
CVE-2021-27639
Published
Jun 9, 2021
Updated
Aug 3, 2024
Vendor
SAP SE
Product
SAP 3D Visual Enterprise Viewer
Classifications
CWE-20, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SAP SE · SAP 3D Visual Enterprise Viewerversion=< 9

Published CVSS scores

4.3SAP SECVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo