CVE-2023-49676

Application crash via corrupt project-file loading

Published May 6, 2024 · Updated Aug 2, 2024

Use-after-free in CODESYS Development System V2.3 before 2.3.9.73 allows local users to trigger a crash via a corrupt project file. The project-file loader continues opening a file identified as corrupt after warning confirmation, leaving malicious file data able to trigger a use-after-free. Exploitation requires a user to open the crafted file and confirm the warning; the documented consequence is a crash, not code execution or data access.

CVSS severity5.5
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

Use-after-free in CODESYS Development System V2.3 before 2.3.9.73 allows local users to trigger a crash via a corrupt project file. The project-file loader continues opening a file identified as corrupt after warning confirmation, leaving malicious file data able to trigger a use-after-free. Exploitation requires a user to open the crafted file and confirm the warning; the documented consequence is a crash, not code execution or data access.

The record

CVE
CVE-2023-49676
Published
May 6, 2024
Updated
Aug 2, 2024
Vendor
CODESYS GmbH
Product
CODESYS Development System
Classifications
CWE-416, T1499.004, 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

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

CODESYS GmbH · CODESYS Development Systemversion=0 <2.3.9.73

Published CVSS scores

5.5CODESYSCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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-416Use After Free
T1499.004Application or System Exploitation
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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