CVE-2020-26982Network attack vector

Code execution via CG4 and CGM parser overwrite

Published Jan 12, 2021 · Updated Aug 4, 2024

Out-of-bounds write in Siemens JT2Go and Teamcenter Visualization before 13.1.0 allows remote attackers to execute code via a crafted CG4 or CGM file. Their CG4 and CGM parsers inadequately validate file data and write beyond the end of an allocated structure. Exploitation requires the target to visit a malicious page or open a malicious file, and successful code runs with the current process's privileges.

CVSS severity8.8
High
EPSS probability3.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Siemens JT2Go and Teamcenter Visualization before 13.1.0 allows remote attackers to execute code via a crafted CG4 or CGM file. Their CG4 and CGM parsers inadequately validate file data and write beyond the end of an allocated structure. Exploitation requires the target to visit a malicious page or open a malicious file, and successful code runs with the current process's privileges.

The record

CVE
CVE-2020-26982
Published
Jan 12, 2021
Updated
Aug 4, 2024
Vendor
Siemens
Product
Teamcenter Visualization
Classifications
CWE-787, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=All versions < V13.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · Teamcenter Visualizationversion=All versions < V13.1.0
Siemens · JT2Goversion=All versions < V13.1.0

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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-787Out-of-bounds Write
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

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Your stack

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