CVE-2023-37194

Host code execution via exposed DMA memory

Published Oct 10, 2023 · Updated Sep 19, 2024

Improper access control in Siemens SIMATIC CP 1604, 1616, 1623, 1626, and 1628 allows local users to execute arbitrary host code. The devices expose host kernel memory to user mode through direct memory access instead of restricting DMA mappings to authorized kernel access. Administrative privileges and local access are required; successful exploitation crosses the user-to-kernel memory boundary and permits unrestricted code execution on the host.

CVSS severity6.7
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Siemens SIMATIC CP 1604, 1616, 1623, 1626, and 1628 allows local users to execute arbitrary host code. The devices expose host kernel memory to user mode through direct memory access instead of restricting DMA mappings to authorized kernel access. Administrative privileges and local access are required; successful exploitation crosses the user-to-kernel memory boundary and permits unrestricted code execution on the host.

The record

CVE
CVE-2023-37194
Published
Oct 10, 2023
Updated
Sep 19, 2024
Vendor
Siemens
Product
SIMATIC CP 1616
Classifications
CWE-284, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 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

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Siemens · SIMATIC CP 1616version=All versions
Siemens · SIMATIC CP 1616 Firmwareversion=0 <*
Siemens · SIMATIC CP 1628version=All versions
Siemens · SIMATIC CP 1626version=All versions
Siemens · SIMATIC CP 1623version=All versions
Siemens · SIMATIC CP 1604 Firmwareversion=0 <*
Siemens · SIMATIC CP 1628 Firmwareversion=0 <*
Siemens · SIMATIC CP 1626 Firmwareversion=0 <*
Siemens · SIMATIC CP 1623 Firmwareversion=0 <*
Siemens · SIMATIC CP 1604version=All versions

Published CVSS scores

6.7Siemens AGCVSS:3.1/AV:L/AC:L/PR:H/UI:N/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.

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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1068Exploitation for Privilege Escalation

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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