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Full vulnerability report · 2021
CVE-2021-22779High confidence

n/a EcoStruxure Control Expert (all versions prior to V15.0 SP1, including all versions of Unity Pro), EcoStruxure Control Expert V15.0 SP1, EcoStruxure Process Expert (all versions, including all versions of EcoStruxure Hybrid DCS), SCADAPack RemoteConnect for x70 (all versions), Modicon M580 CPU (all versions - part numbers BMEP* and BMEH*), Modicon M340 CPU (all versions - part numbers BMXP34*) — Authentication Bypass by Spoofing

Unknown · EcoStruxure Control Expert (all versions prior to V15.0 SP1, including all versions of Unity Pro), EcoStruxure Control Expert V15.0 SP1, EcoStruxure Process Expert (all versions, including all versions of EcoStruxure Hybrid DCS), SCADAPack RemoteConnect for x70 (all versions), Modicon M580 CPU (all versions - part numbers BMEP* and BMEH*), Modicon M340 CPU (all versions - part numbers BMXP34*)

9.1CriticalCVSS 3.1
Recommended action
Within 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityCriticalOperational priority:Critical, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 1.02% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Unknown EcoStruxure Control Expert (all versions prior to V15.0 SP1, including all versions of Unity Pro), EcoStruxure Control Expert V15.0 SP1, EcoStruxure Process Expert (all versions, including all versions of EcoStruxure Hybrid DCS), SCADAPack RemoteConnect for x70 (all versions), Modicon M580 CPU (all versions - part numbers BMEP* and BMEH*), Modicon M340 CPU (all versions - part numbers BMXP34*) 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: Within 3 daysRemediation target: Within 90 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-2021-194-01 · CSAF 2.0 · revision 9.0.0 · finalSchneider Electric CPCERTEcoStruxureTM Control Expert, EcoStruxureTM Process Expert, SCADAPack RemoteConnect™ x70, and Modicon Controllers M580 and M340
7 known affected

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

  • Schneider Electric EcoStruxure™ Control Expert versions prior to 15.0 SP1
  • Schneider Electric EcoStruxure™ Process Expert versions prior to 2021
  • Schneider Electric Modicon M580 CPU, All versions
  • Schneider Electric Modicon M340 CPU versions prior to 3.50
  • Schneider Electric Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S) Versions prior to SV4.21
  • Schneider Electric Modicon M580 CPU 4.02
  • Schneider Electric Modicon M580 CPU versions prior to SV4.10
Summary
A CWE-290: Authentication Bypass by Spoofing vulnerability exists that could cause unauthorized access in read and write mode to the controller by spoofing the Modbus communication between the engineering software and the controller.
Remediation
EcoStruxure™ Control Expert V15.1*, available for download below, includes a fix for CVE-2021-22778, CVE-2021-22780, CVE-2021-22781, CVE-2021-22782, CVE-2020-12525, and CVE-2021-22779: https://www.se.com/ww/en/download/document/EcoStruxureControlExpert_V15.1/ * Upgrading to EcoStruxure™ Control Expert V15.1 is the first step in a two steps process to fully address CVE-2021-22779. The second step is to update the firmware of the Modicon Controllers referenced. Important Note: • The fix is provided through the additional feature “file encryption”, for further information on the feature and how to set it up please refers to the chapter “file encryption” of the help file available in the EcoStruxure™ Control Expert v15.0 SP1. • This feature is proposed by default when creating a new project. • This feature is also available, after selecting “project” in structural view, in the “Edit/ Properties/ Project & Controller Protection” menu. • For new projects: Customers are recommended to apply this feature to all new projects. • For existing projects: Customers are recommended to apply this feature to the existing projects coming from trusted source. For sta project files, as a reminder, project modification can be done in connected mode to prevent desynchronization and keep the controller in RUN state. • It is possible to set a security level specific to the Derived Function Blocks (DFB) in addition to the file encryption feature. Please refer to the chapter "How to protect a DFB type" in the EcoStruxure™ Control Expert help file for further information. • Customers are recommended to share project files only when configured with the encryption feature described above. If customers choose not to apply the remediation provided above, they should immediately apply the following mitigations to reduce the risk of exploit. These mitigations also reduce the risk of exploit for CVE-2021-22779 on all versions of EcoStruxure™ Control Expert, including V15.1: • Store the project files in a secure storage and restrict the access to only trusted users • When exchanging files over the network, use secure communication protocols • Encrypt project files when stored • Only open project files received from trusted source • Compute a hash of the project files and regularly check the consistency of this hash to verify the integrity before usage • Harden the workstation running EcoStruxure™ Control Expert or Unity Pro Customers using Unity Pro should strongly consider migrating to EcoStruxure™ Control Expert. Please contact your local Schneider Electric technical support for more information.
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-2021-9914

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 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

Patch available
01

What, why and how

Authentication Bypass by Spoofing vulnerability exists in EcoStruxure Control Expert (all versions prior to V15.0 SP1, including all versions of Unity Pro), EcoStruxure Control Expert V15.0 SP1, EcoStruxure Process Expert (all versions, including all versions of EcoStruxure Hybrid DCS), SCADAPack RemoteConnect for x70 (all versions), Modicon M580 CPU (all versions - part numbers BMEP* and BMEH*), Modicon M340 CPU (all versions - part numbers BMXP34*), that could cause unauthorized access in read and write mode to the controller by spoofing the Modbus communication between the engineering software and the controller.

What

Authentication Bypass by Spoofing vulnerability exists in EcoStruxure Control Expert (all versions prior to V15.0 SP1, including all versions of Unity Pro), EcoStruxure Control Expert V15.0 SP1, EcoStruxure Process Expert (all versions, including all versions of EcoStruxure Hybrid DCS), SCADAPack RemoteConnect for x70 (all versions), Modicon M580 CPU (all versions - part numbers BMEP* and BMEH*), Modicon M340 CPU (all versions - part numbers BMXP34*), that could cause unauthorized access in read and write mode to the controller by spoofing the Modbus communication between the engineering software and the controller.

Why

This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may bypass an access boundary or take over an account.

What

Authentication Bypass by Spoofing vulnerability exists in EcoStruxure Control Expert (all versions prior to V15.0 SP1, including all versions of Unity Pro), EcoStruxure Control Expert V15.0 SP1, EcoStruxure Process Expert (all versions, including all versions of EcoStruxure Hybrid DCS), SCADAPack RemoteConnect for x70 (all versions), Modicon M580 CPU (all versions - part numbers BMEP* and BMEH*), Modicon M340 CPU (all versions - part numbers BMXP34*), that could cause unauthorized access in read and write mode to the controller by spoofing the Modbus communication between the engineering software and the controller.

Why

This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may bypass an access boundary or take over an account.

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
a network path → Authentication Bypass by Spoofing → bypass an access boundary or take over an account
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
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-290 ↗

CWE-290: Authentication Bypass by Spoofing. This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

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

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

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.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.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
Stolen credentials, tokens and legitimate administration functions may provide continued access without deploying a large custom toolset.
NetworkUnauthenticatedCWE-290
A

Official authority intelligence

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

Cyber Security Agency of Singapore · English · CSA-SB-20210721Security Bulletin 21 Jul 2021

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 21 Jul 2021, published on 21 July 2021. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-717Multiples vulnérabilités dans les produits Schneider

/CVERecord?id=CVE-2019-6842 Référence CVE CVE-2019-6843 https://www.cve.org/CVERecord?id=CVE-2019-6843 Référence CVE CVE-2019-6844 https://www.cve.org/CVERecord?id=CVE-2019-6844 Référence CVE CVE-2019-6846 https://www.cve.org/CVERecord?id=CVE-2019-6846 Référence CVE CVE-2019-6847 https://www.cve.org/CVERecord?id=CVE-2019-6847 Référence CVE CVE-2020-12525 https://www.cve.org/CVERecord?id=CVE-2020-12525 Référence CVE CVE-2020-28895 https://www.cve.org/CVERecord?id=CVE-2020-28895 Référence CVE CVE-2020-35198 https://www.cve.org/CVERecord?id=CVE-2020-35198 Référence CVE CVE-2021-22778 https://www.cve.org/CVERecord?id=CVE-2021-22778 Référence CVE CVE-2021-22779 https://www.cve.org/CVERecord?id=CVE-2021-22779 Référence CVE CVE-2021-22780 https://www.cve.org/CVERecord?id=CVE-2021-22780 Référence CVE CVE-2021-22781 https://www.cve.org/CVERecord?id=CVE-2021-22781 Référence CVE CVE-2021-22782 https://www.cve.org/CVERecord?id=CVE-2021-22782 Référence CVE CVE-2021-22786 https://www.cve.org/CVERecord?id=CVE-2021-22786 Référence CVE CVE-2021-22789 https://www.cve.org/CVERecord?id=CVE-2021-22789 Référence CVE CVE-2021-22790 https://www.cve.org/CVERecord?id=CVE-2021-22790 Référence CVE CVE-2021-22791 https://www.cve.org/CVERecord?id=CVE-2021-22791 Référence CVE CVE-2021-22792 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-628Multiples vulnérabilités dans les produits Schneider Electric

d?id=CVE-2021-21830 Référence CVE CVE-2021-21863 https://www.cve.org/CVERecord?id=CVE-2021-21863 Référence CVE CVE-2021-21864 https://www.cve.org/CVERecord?id=CVE-2021-21864 Référence CVE CVE-2021-21865 https://www.cve.org/CVERecord?id=CVE-2021-21865 Référence CVE CVE-2021-21866 https://www.cve.org/CVERecord?id=CVE-2021-21866 Référence CVE CVE-2021-21867 https://www.cve.org/CVERecord?id=CVE-2021-21867 Référence CVE CVE-2021-21868 https://www.cve.org/CVERecord?id=CVE-2021-21868 Référence CVE CVE-2021-21869 https://www.cve.org/CVERecord?id=CVE-2021-21869 Référence CVE CVE-2021-22778 https://www.cve.org/CVERecord?id=CVE-2021-22778 Référence CVE CVE-2021-22779 https://www.cve.org/CVERecord?id=CVE-2021-22779 Référence CVE CVE-2021-22780 https://www.cve.org/CVERecord?id=CVE-2021-22780 Référence CVE CVE-2021-22781 https://www.cve.org/CVERecord?id=CVE-2021-22781 Référence CVE CVE-2021-22782 https://www.cve.org/CVERecord?id=CVE-2021-22782 Référence CVE CVE-2021-22797 https://www.cve.org/CVERecord?id=CVE-2021-22797 Référence CVE CVE-2021-29240 https://www.cve.org/CVERecord?id=CVE-2021-29240 Référence CVE CVE-2021-29241 https://www.cve.org/CVERecord?id=CVE-2021-29241 Référence CVE CVE-2021-33485 https://www.cve.org/CVERecord?id=CVE-2021-33485 Référence CVE CVE-2022-0715 https://www.cve.org/CVERecord?id=C

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-215Multiples vulnérabilités dans les produits Schneider

d?id=CVE-2021-21814 Référence CVE CVE-2021-21815 https://www.cve.org/CVERecord?id=CVE-2021-21815 Référence CVE CVE-2021-21825 https://www.cve.org/CVERecord?id=CVE-2021-21825 Référence CVE CVE-2021-21826 https://www.cve.org/CVERecord?id=CVE-2021-21826 Référence CVE CVE-2021-21827 https://www.cve.org/CVERecord?id=CVE-2021-21827 Référence CVE CVE-2021-21828 https://www.cve.org/CVERecord?id=CVE-2021-21828 Référence CVE CVE-2021-21829 https://www.cve.org/CVERecord?id=CVE-2021-21829 Référence CVE CVE-2021-21830 https://www.cve.org/CVERecord?id=CVE-2021-21830 Référence CVE CVE-2021-22778 https://www.cve.org/CVERecord?id=CVE-2021-22778 Référence CVE CVE-2021-22779 https://www.cve.org/CVERecord?id=CVE-2021-22779 Référence CVE CVE-2021-22780 https://www.cve.org/CVERecord?id=CVE-2021-22780 Référence CVE CVE-2021-22781 https://www.cve.org/CVERecord?id=CVE-2021-22781 Référence CVE CVE-2021-22782 https://www.cve.org/CVERecord?id=CVE-2021-22782 Référence CVE CVE-2021-22783 https://www.cve.org/CVERecord?id=CVE-2021-22783 Référence CVE CVE-2021-22797 https://www.cve.org/CVERecord?id=CVE-2021-22797 Référence CVE CVE-2021-34527 https://www.cve.org/CVERecord?id=CVE-2021-34527 Référence CVE CVE-2022-0715 https://www.cve.org/CVERecord?id=CVE-2022-0715 Référence CVE CVE-2022-22805 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-1093Multiples vulnérabilités dans les produits Schneider

.org/CVERecord?id=CVE-2019-6841 Référence CVE CVE-2019-6842 https://www.cve.org/CVERecord?id=CVE-2019-6842 Référence CVE CVE-2019-6843 https://www.cve.org/CVERecord?id=CVE-2019-6843 Référence CVE CVE-2019-6844 https://www.cve.org/CVERecord?id=CVE-2019-6844 Référence CVE CVE-2019-6846 https://www.cve.org/CVERecord?id=CVE-2019-6846 Référence CVE CVE-2019-6847 https://www.cve.org/CVERecord?id=CVE-2019-6847 Référence CVE CVE-2020-28895 https://www.cve.org/CVERecord?id=CVE-2020-28895 Référence CVE CVE-2020-35198 https://www.cve.org/CVERecord?id=CVE-2020-35198 Référence CVE CVE-2020-6996 https://www.cve.org/CVERecord?id=CVE-2020-6996 Référence CVE CVE-2021-22779 https://www.cve.org/CVERecord?id=CVE-2021-22779 Référence CVE CVE-2021-22786 https://www.cve.org/CVERecord?id=CVE-2021-22786 Référence CVE CVE-2021-22789 https://www.cve.org/CVERecord?id=CVE-2021-22789 Référence CVE CVE-2021-22790 https://www.cve.org/CVERecord?id=CVE-2021-22790 Référence CVE CVE-2021-22791 https://www.cve.org/CVERecord?id=CVE-2021-22791 Référence CVE CVE-2021-22792 https://www.cve.org/CVERecord?id=CVE-2021-22792 Référence CVE CVE-2022-37300 https://www.cve.org/CVERecord?id=CVE-2022-37300 Référence CVE CVE-2022-37301 https://www.cve.org/CVERecord?id=CVE-2022-37301 Référence CVE CVE-2022-4062 https://www.cve.org/CVERecord?id=C

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-517Multiples vulnérabilités dans les produits Schneider

Easergy T200 (IEC104) versions antérieures à SC2-04IEC-07000103 Easergy T200 (DNP3) versions antérieures à SC2-04DNP-07000103 EVlink CityEVC1S22P4 / EVC1S7P4 versions antérieures à R8 V3.4.0.1 EVlink ParkingEVW2 / EVF2 / EV.2 versions antérieures à R8 V3.4.0.1 EVlink Smart WallboxEVB1A versions antérieures à R8 V3.4.0.1 Note : Actuellement, aucun correctif n'est proposé pour les vulnérabilités dans les produits EcoStruxure Process Expert, Modicon M580, Modicon M340 et SCADAPack. Cependant des mesures de contournement sont proposées par l'éditeur pour les produits Modicon M580 et M340 afin de réduire le risque et l'impact d'exploitation de la CVE-2021-22779. Résumé De multiples vulnérabilités ont été découvertes dans les produits Schneider. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire, un dénis de service, un contournement de la politique de sécurité et une atteinte à l'intégrité des données. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Schneider SEVD-2021-194-01 du 13 juillet 2021 https://download.schneider-electric.com/files?p_enDocType=Technical+leaflet&p_File_Name=SEVD-2021-194-01_EcoStruxure_Control_Expert_Process_Expert_SCADAPack_Re

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-009773複数の Schneider Electric 製品におけるスプーフィングによる認証回避に関する脆弱性

複数の Schneider Electric 製品には、スプーフィングによる認証回避に関する脆弱性が存在します。

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
EcoStruxure™ Control Expert V15.1*, available for download below, includes a fix for CVE-2021-22778, CVE-2021-22780, CVE-2021-22781, CVE-2021-22782, CVE-2020-12525, and CVE-2021-22779: https://www.se.com/ww/en/download/document/EcoStruxureControlExpert_V15.1/ * Upgrading to EcoStruxure™ Control Expert V15.1 is the first step in a two steps process to fully address CVE-2021-22779. The second step is to update the firmware of the Modicon Controllers referenced. Important Note: • The fix is provided through the additional feature “file encryption”, for further information on the feature and how to set it up please refers to the chapter “file encryption” of the help file available in the EcoStruxure™ Control Expert v15.0 SP1. • This feature is proposed by default when creating a new project. • This feature is also available, after selecting “project” in structural view, in the “Edit/ Properties/ Project & Controller Protection” menu. • For new projects: Customers are recommended to apply this feature to all new projects. • For existing projects: Customers are recommended to apply this feature to the existing projects coming from trusted source. For sta project files, as a reminder, project modification can be done in connected mode to prevent desynchronization and keep the controller in RUN state. • It is possible to set a security level specific to the Derived Function Blocks (DFB) in addition to the file encryption feature. Please refer to the chapter "How to protect a DFB type" in the EcoStruxure™ Control Expert help file for further information. • Customers are recommended to share project files only when configured with the encryption feature described above. If customers choose not to apply the remediation provided above, they should immediately apply the following mitigations to reduce the risk of exploit. These mitigations also reduce the risk of exploit for CVE-2021-22779 on all versions of EcoStruxure™ Control Expert, including V15.1: • Store the project files in a secure storage and restrict the access to only trusted users • When exchanging files over the network, use secure communication protocols • Encrypt project files when stored • Only open project files received from trusted source • Compute a hash of the project files and regularly check the consistency of this hash to verify the integrity before usage • Harden the workstation running EcoStruxure™ Control Expert or Unity Pro Customers using Unity Pro should strongly consider migrating to EcoStruxure™ Control Expert. Please contact your local Schneider Electric technical support for more information.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 14 Jul 2021 · Last source change 29 May 2026, 13:50 UTC · CWE-290 · Authentication Bypass by Spoofing

CVE recordCVE.org · 5.2
CVSS sourceNIST NVD
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-2021-9914
Product sourceVendor CSAF · Schneider Electric CPCERT
Remediation sourceVendor CSAF · Schneider Electric CPCERT
CWE sourceCNA
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    EcoStruxure Control Expert (all versions prior to V15.0 SP1, including all versions of Unity Pro), EcoStruxure Control Expert V15.0 SP1, EcoStruxure Process Expert (all versions, including all versions of EcoStruxure Hybrid DCS), SCADAPack RemoteConnect for x70 (all versions), Modicon M580 CPU (all versions - part numbers BMEP* and BMEH*), Modicon M340 CPU (all versions - part numbers BMXP34*) · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    EcoStruxure Control Expert (all versions prior to V15.0 SP1, including all versions of Unity Pro), EcoStruxure Control Expert V15.0 SP1, EcoStruxure Process Expert (all versions, including all versions of EcoStruxure Hybrid DCS), SCADAPack RemoteConnect for x70 (all versions), Modicon M580 CPU (all versions - part numbers BMEP* and BMEH*), Modicon M340 CPU (all versions - part numbers BMXP34*) · Fixed: EcoStruxure™ Control Expert V15.1*, available for download below, includes a fix for CVE-2021-22778, CVE-2021-22780, CVE-2021-22781, CVE-2021-22782, CVE-2020-12525, and CVE-2021-22779: https://www.se.com/ww/en/download/document/EcoStruxureControlExpert_V15.1/ * Upgrading to EcoStruxure™ Control Expert V15.1 is the first step in a two steps process to fully address CVE-2021-22779. The second step is to update the firmware of the Modicon Controllers referenced. Important Note: • The fix is provided through the additional feature “file encryption”, for further information on the feature and how to set it up please refers to the chapter “file encryption” of the help file available in the EcoStruxure™ Control Expert v15.0 SP1. • This feature is proposed by default when creating a new project. • This feature is also available, after selecting “project” in structural view, in the “Edit/ Properties/ Project & Controller Protection” menu. • For new projects: Customers are recommended to apply this feature to all new projects. • For existing projects: Customers are recommended to apply this feature to the existing projects coming from trusted source. For sta project files, as a reminder, project modification can be done in connected mode to prevent desynchronization and keep the controller in RUN state. • It is possible to set a security level specific to the Derived Function Blocks (DFB) in addition to the file encryption feature. Please refer to the chapter "How to protect a DFB type" in the EcoStruxure™ Control Expert help file for further information. • Customers are recommended to share project files only when configured with the encryption feature described above. If customers choose not to apply the remediation provided above, they should immediately apply the following mitigations to reduce the risk of exploit. These mitigations also reduce the risk of exploit for CVE-2021-22779 on all versions of EcoStruxure™ Control Expert, including V15.1: • Store the project files in a secure storage and restrict the access to only trusted users • When exchanging files over the network, use secure communication protocols • Encrypt project files when stored • Only open project files received from trusted source • Compute a hash of the project files and regularly check the consistency of this hash to verify the integrity before usage • Harden the workstation running EcoStruxure™ Control Expert or Unity Pro Customers using Unity Pro should strongly consider migrating to EcoStruxure™ Control Expert. Please contact your local Schneider Electric technical support for more information.
    Schneider Electric CPCERT ↗
  2. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    Schneider Electric CPCERT ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2021-9914↗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-2021-22779 · cve.blacktree.nl