CVE-2023-49675

highpriority · track · 0EPSS 0.002 · 9 %ileDEEUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.20% (9th) EPSS
CVSS 7.8 · high
Is it mine?
9 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · cisa_csaf_ot · codesys_psirt

EPSS · scored 2026-10-22

An unauthenticated local attacker may trick a user to open corrupted project files to execute arbitrary code or crash the system due to an out-of-bounds write vulnerability.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedFirmware <2.3.9.73 installed on CODESYS Development System V2.3codesys_psirt

    Update the CODESYS Development System V2.3 to version 2.3.9.73. As of this version, projects recognized as corrupt can no longer be opened with the CODESYS Development System V2.3. If the CODESYS Development System V2.3 detects that the project file has been manipulated, the user will be informed, and the loading will be terminated. Note: CODESYS V2.3 is currently in the service phase. Please consider upgrading to CODESYS V3. Please visit the CODESYS download area for more information on how to obtain the software update.

  • MitigationFesto Automation Suite <2.8.0.138 installed with CODESYS Development System 3.0festo_psirt

    Starting from Festo Automation Suite version 2.8.0.138, Codesys is no longer bundled with the suite and must be downloaded and installed separately by the customer. To mitigate this vulnerability customers are advised to: Download the latest, patched version of Codesys directly from the official Codesys website. Follow the installation and update instructions provided by Codesys to ensure all security fixes are applied. Regularly monitor Codesys security advisories and apply updates promptly. Maintain the Festo Automation Suite connector up to date by installing FAS updates as released by Festo.

  • MitigationFesto Automation Suite <2.8.0.138 installed with CODESYS Development System 3.5.16.10festo_psirt

    Starting from Festo Automation Suite version 2.8.0.138, Codesys is no longer bundled with the suite and must be downloaded and installed separately by the customer. To mitigate this vulnerability customers are advised to: Download the latest, patched version of Codesys directly from the official Codesys website. Follow the installation and update instructions provided by Codesys to ensure all security fixes are applied. Regularly monitor Codesys security advisories and apply updates promptly. Maintain the Festo Automation Suite connector up to date by installing FAS updates as released by Festo.

  • MitigationFirmware <2.3.9.73 installed on CODESYS Development System V2.3codesys_psirt

    CODESYS GmbH strongly recommends only opening projects from trustworthy sources! If the following dialog appears when opening a project, please pay attention to this warning and do not try to load the affected project: "The project file is corrupt. Would you still like to try to load the project? Attention! CODESYS could become unstable when loading a corrupt project file." In addition, we recommend saving projects with password encryption, which offers even more protection against tampering of the project.

  • MitigationFesto Automation Suite <2.8.0.138 installed with CODESYS Development System 3.0cisa_csaf_ot

    Starting from Festo Automation Suite version 2.8.0.138, Codesys is no longer bundled with the suite and must be downloaded and installed separately by the customer. To mitigate this vulnerability customers are advised to: Download the latest, patched version of Codesys directly from the official Codesys website. Follow the installation and update instructions provided by Codesys to ensure all security fixes are applied. Regularly monitor Codesys security advisories and apply updates promptly. Maintain the Festo Automation Suite connector up to date by installing FAS updates as released by Festo.

  • MitigationFesto Automation Suite <2.8.0.138 installed with CODESYS Development System 3.5.16.10cisa_csaf_ot

    Starting from Festo Automation Suite version 2.8.0.138, Codesys is no longer bundled with the suite and must be downloaded and installed separately by the customer. To mitigate this vulnerability customers are advised to: Download the latest, patched version of Codesys directly from the official Codesys website. Follow the installation and update instructions provided by Codesys to ensure all security fixes are applied. Regularly monitor Codesys security advisories and apply updates promptly. Maintain the Festo Automation Suite connector up to date by installing FAS updates as released by Festo.

02

cvss

Technical severity, 0–10. One row per scoring source.

7.8
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · CISA US
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · ENISA EU
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · info@cert.vde.comexploitability 1.8 · impact 5.9
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · Festo PSIRT DE
v3.17.1highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · CODESYS PSIRT
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USCWE-787USCWE-787USCWE-787US
05

affected products (9)

Products and version ranges known to be affected.

06

advisories (4)

Vendor and ecosystem advisories describing this.

  • FSA-202601Several CODESYS vulnerabilities in Festo Automation Suite2026-02-26csaf · festo_psirtDE

    Starting with Festo Automation Suite (FAS) version 2.8.0.138, the suite is delivered only with a connector to Codesys, rather than including Codesys directly. Prior to this version, Codesys was bundled within the FAS installation. From version 2.8.0.138 onwards, customers are required to download and install Codesys independently. This change impacts the handling of security vulnerabilities (CVEs) related to Codesys. Any Codesys-related security issues must now be addressed by the customer through their separate Codesys installation. The FAS itself includes only the connector component, which is maintained and updated within the suite. Please ensure that Codesys is kept up to date independently to mitigate any potential security risks associated with the Codesys software.

  • VDE-2024-024CODESYS: Development System V2.3 affected by two vulnerabilities through corrupted project files2024-05-06csaf · codesys_psirtDE

    Local attackers can cause affected CODESYS Development System V2.3 installations to crash or execute code by opening malicious project files. The CODESYS Development System V2.3 is an IEC 61131-3 programming tool for the industrial controller and automation technology sector. It stores the program code for the controller and its configuration in project files (*.pro).

  • WID-SEC-W-2024-1026CODESYS: Mehrere SchwachstellenDeutsch2024-05-05csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in CODESYS ausnutzen, um beliebigen Code auszuführen oder einen Denial-of-Service-Zustand zu verursachen.

  • ICSA-26-076-01CODESYS in Festo Automation Suite2026-02-26icsa · cisa_csaf_otUS

    Starting with Festo Automation Suite (FAS) version 2.8.0.138, the suite is delivered only with a connector to Codesys, rather than including Codesys directly. Prior to this version, Codesys was bundled within the FAS installation. From version 2.8.0.138 onwards, customers are required to download and install Codesys independently. This change impacts the handling of security vulnerabilities (CVEs) related to Codesys. Any Codesys-related security issues must now be addressed by the customer through their separate Codesys installation. The FAS itself includes only the connector component, which is maintained and updated within the suite. Please ensure that Codesys is kept up to date independently to mitigate any potential security risks associated with the Codesys software.

07

also known as (3)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcisa_csaf_otcodesys_psirtfesto_psirtcert_bundNVDCVE.orgMITRE
published 2024-05-06modified 2026-06-17
09

references (5)

External citations — patches, advisories, analysis.

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