CVE-2023-49675

Code execution via corrupt project file parsing

Published May 6, 2024 · Updated Aug 2, 2024

Out-of-bounds write in CODESYS Development System V2.3 before 2.3.9.73 allows local users to execute code via a corrupt project file. The project loader continues processing a file identified as corrupt after warning confirmation, allowing malformed content to write beyond a memory buffer. Exploitation requires a user to accept the warning and open the attacker-supplied file; successful exploitation runs code in the application context or crashes it.

CVSS severity7.8
High
EPSS probability0.20%
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 CODESYS Development System V2.3 before 2.3.9.73 allows local users to execute code via a corrupt project file. The project loader continues processing a file identified as corrupt after warning confirmation, allowing malformed content to write beyond a memory buffer. Exploitation requires a user to accept the warning and open the attacker-supplied file; successful exploitation runs code in the application context or crashes it.

The record

CVE
CVE-2023-49675
Published
May 6, 2024
Updated
Aug 2, 2024
Vendor
CODESYS GmbH
Product
CODESYS Development System
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=0 <2.3.9.73
  2. Affected versionversion=2.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

CODESYS GmbH · CODESYS Development Systemversion=0 <2.3.9.73; version=2.3

Published CVSS scores

7.8CODESYSCVSS: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-787Out-of-bounds Write
T1204.002User Execution: Malicious 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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