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Full vulnerability report · 2023
CVE-2023-3662High confidence

CODESYS: Vulnerability in CODESYS Development System allows for execution of binaries

CODESYS · CODESYS Development System

7.3HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Medium, lowered one band.downgradedsince 27 Feb 2025

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.21% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs CODESYS CODESYS Development System and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
SEVD-2023-192-04 · CSAF 2.0 · revision 8.1.0 · finalSchneider Electric CPCERTCODESYS Runtime Vulnerabilities
15 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • Schneider Electric HMISCU Controller All versions prior to v6.3.1
  • Schneider Electric Modicon Controller M241 All versions prior to v5.2.11.18
  • Schneider Electric Modicon Controller M251 All Versions prior to v5.2.11.18
  • Schneider Electric Modicon Controller M262 All versions prior to v5.2.8.12
  • Schneider Electric Modicon Controller M258 All Versions
  • Schneider Electric Modicon Controller LMC058 All Versions
  • Schneider Electric PacDrive 3 Controllers: LMC Eco/Pro/Pro2 All versions prior to v1.76.14.1
  • Schneider Electric SoftSPS embedded in EcoStruxure™ Machine Expert All Versions prior to Machine Expert v2.2
  • Schneider Electric Vijeo Designer embedded in EcoStruxure™ Machine Expert All versions prior to v6.3.1
  • Schneider Electric Harmony (Formerly Magelis) HMIGK/HMIGTO/HMIGTU/HMIGTUX/HMISTU series All Versions prior to V6.3 HF3
  • Schneider Electric Easy Harmony HMIET6/HMIFT6 Magelis HMIGXU all versions prior to v2.0 HF2
  • Schneider Electric Magelis XBT series All Versions
Summary
The CODESYS Development System is vulnerable to the execution of malicious binaries from the current working directory.
Remediation
Version 6.3.1 of Vijeo Designer includes a fix for this vulnerability and can be updated through the Schneider Electric Software Update (SESU) application. https://www.se.com/ww/en/product-range/1054-vijeodesigner-hmi-software/#software-and-firmware On the engineering workstation, update to v6.3.1 of Vijeo Designer. In order to complete the update, connect to Harmony HMI and download the project file using Vijeo Designer v6.3.1.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2023-44306

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

In CODESYS Development System versions from 3.5.17.0 and prior to 3.5.19.20 a vulnerability allows for execution of binaries from the current working directory in the users context .

What

In CODESYS Development System versions from 3.5.17.0 and prior to 3.5.19.20 a vulnerability allows for execution of binaries from the current working directory in the users context .

Why

The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

In CODESYS Development System versions from 3.5.17.0 and prior to 3.5.19.20 a vulnerability allows for execution of binaries from the current working directory in the users context .

Why

The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Uncontrolled Search Path Element → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-427 ↗

CWE-427: Uncontrolled Search Path Element. The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
CWE-427
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2024-0943CODESYS: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in CODESYS ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen, vertrauliche Informationen offenzulegen, Dateien zu manipulieren oder einen Brute-Force-Angriff durchzuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20230809Security Bulletin 09 Aug 2023

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 09 Aug 2023, published on 9 August 2023. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-0632Multiples vulnérabilités dans les produits Schneider Electric

ric.com/files?p_Doc_Ref=SEVD-2023-192-04&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2023-192-04.pdf Bulletin de sécurité Schneider Electric SEVD-2023-220-01 du 8 août 2023 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2023-220-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2023-220-01.pdf Référence CVE CVE-2022-4046 https://www.cve.org/CVERecord?id=CVE-2022-4046 Référence CVE CVE-2022-45788 https://www.cve.org/CVERecord?id=CVE-2022-45788 Référence CVE CVE-2022-45789 https://www.cve.org/CVERecord?id=CVE-2022-45789 Référence CVE CVE-2023-28355 https://www.cve.org/CVERecord?id=CVE-2023-28355 Référence CVE CVE-2023-3662 https://www.cve.org/CVERecord?id=CVE-2023-3662 Référence CVE CVE-2023-3663 https://www.cve.org/CVERecord?id=CVE-2023-3663 Référence CVE CVE-2023-3669 https://www.cve.org/CVERecord?id=CVE-2023-3669 Référence CVE CVE-2023-3670 https://www.cve.org/CVERecord?id=CVE-2023-3670 Référence CVE CVE-2023-37545 https://www.cve.org/CVERecord?id=CVE-2023-37545 Référence CVE CVE-2023-37546 https://www.cve.org/CVERecord?id=CVE-2023-37546 Référence CVE CVE-2023-37547 https://www.cve.org/CVERecord?id=CVE-2023-37547 Référence CVE CVE-2023-37548 https://www.cve.org/CVERecord?id=CVE-2023-37548 Référence CVE CVE-2023-37549 https://www.cve.org/CVERecord?id=CVE-202

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-021479CODESYS GmbH の CODESYS Development System における制御されていない検索パスの要素に関する脆弱性

CODESYS GmbH の CODESYS Development System には、制御されていない検索パスの要素に関する脆弱性が存在します。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-001664複数のSchneider Electric製品における複数の脆弱性

Schneider Electricが提供する複数の製品には、次の複数の脆弱性が存在します。 情報漏えい（CWE-200） - CVE-2018-12130 入力データの整合性検証不備（CWE-1288） - CVE-2022-47378、CVE-2022-47392、CVE-2022-47391 境界外書き込み（CWE-787） - CVE-2022-47379、CVE-2023-37557 スタックベースのバッファオーバーフロー（CWE-121） - CVE-2022-47380、 CVE-2022-47381、 CVE-2022-47382、 CVE-2022-47383、 CVE-2022-47384、 CVE-2022-47386、 CVE-2022-47387、 CVE-2022-47388、 CVE-2022-47389、 CVE-2022-47390、 CVE-2022-47385 信頼できないポインタの参照（CWE-822） - CVE-2022-47393 バッファーエラー（CWE-119） - CVE-2022-4046 データ完全性の検証不備（CWE-354） - CVE-2023-28355 不適切な入力確認（CWE-20） - CVE-2023-37545、 CVE-2023-37546、 CVE-2023-37547、 CVE-2023-37548、 CVE-2023-37549、 CVE-2023-37550、 CVE-2023-37552、 CVE-2023-37553、 CVE-2023-37554、 CVE-2023-37555、 CVE-2023-37556、 CVE-2023-37558、 CVE-2023-37559 外部からアクセス可能なファイルまたはディレクトリ（CWE-552） - CVE-2023-37551 ファイル検索パスの制御不備（CWE-427） - CVE-2023-3662 通信チャネルで送受信するメッセージに対する完全性の検証不備（CWE-924） - CVE-2023-3663 過度な認証試行の不適切な制限（CWE-307） - CVE-2023-3669 誤った領域へのリソースの漏えい（CWE-668） - CVE-2023-3670

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
Action
Version 6.3.1 of Vijeo Designer includes a fix for this vulnerability and can be updated through the Schneider Electric Software Update (SESU) application. https://www.se.com/ww/en/product-range/1054-vijeodesigner-hmi-software/#software-and-firmware On the engineering workstation, update to v6.3.1 of Vijeo Designer. In order to complete the update, connect to Harmony HMI and download the project file using Vijeo Designer v6.3.1.
Workaround
A mitigation or workaround reference is available from the source linked below; validate it against the affected product and version.
04

Evidence and provenance

Published 3 Aug 2023 · Last source change 27 Feb 2025, 21:11 UTC · CWE-427 · Uncontrolled Search Path Element

CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2023-44306
Product sourceVendor CSAF · Schneider Electric CPCERT
Remediation sourceVendor CSAF · Schneider Electric CPCERT
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    3.5.17.0 < 3.5.19.20 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    3.5.17.0 < 3.5.19.20 · Fixed: Version 6.3.1 of Vijeo Designer includes a fix for this vulnerability and can be updated through the Schneider Electric Software Update (SESU) application. https://www.se.com/ww/en/product-range/1054-vijeodesigner-hmi-software/#software-and-firmware On the engineering workstation, update to v6.3.1 of Vijeo Designer. In order to complete the update, connect to Harmony HMI and download the project file using Vijeo Designer v6.3.1.
    Schneider Electric CPCERT ↗
  2. Remediation statusRemediation status changed from Mitigation available to Patch available.
    Before
    Mitigation available
    After
    Patch available
    Schneider Electric CPCERT ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Mitigation reference recorded
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2023-44306↗Schneider Electric CPCERT security advisory↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2023-3662 · cve.blacktree.nl