CVE-2023-30796

Code execution via out-of-bounds JT parsing

Published Aug 8, 2023 · Updated Oct 11, 2024

Out-of-bounds read in Siemens JT Open before 11.4 and JT Utilities before 13.4 allows attackers to execute code via crafted JT files. The JT parsers read past the end of an allocated structure while processing malformed file data; no finer-grained code locus is public. A user must open the crafted file, after which code runs with the affected process's privileges and the application can also crash.

CVSS severity7.8
High
EPSS probability0.22%
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 read in Siemens JT Open before 11.4 and JT Utilities before 13.4 allows attackers to execute code via crafted JT files. The JT parsers read past the end of an allocated structure while processing malformed file data; no finer-grained code locus is public. A user must open the crafted file, after which code runs with the affected process's privileges and the application can also crash.

The record

CVE
CVE-2023-30796
Published
Aug 8, 2023
Updated
Oct 11, 2024
Vendor
Siemens
Product
JT Utilities
Classifications
CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 11, 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?

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  1. Affected versionversion=All versions < V13.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Siemens · JT Utilitiesversion=All versions < V13.4
Siemens · JT Open Toolkitversion=All versions < V11.4

Published CVSS scores

7.8Siemens AGCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

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No observations available

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

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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