Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 0.88% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2023
CVE-2022-4046High confidence
CODESYS: Improper memory restrictions fro CODESYS Control
CODESYS · CODESYS Control for BeagleBone SL
8.8HighCVSS 3.1
Patch only the product branches with a verified fix
Fix availability varies by productHigh technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 14 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityHigh→Operational priority:High, unchanged from published severity.unchanged
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
- Confirm that the asset runs CODESYS CODESYS Control for BeagleBone SL and falls inside the recorded affected range.
- Verify the installed build against the product-specific fixed version after deployment.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Remediation availability differs by product scope
Verified remediation exists for at least one product or source, but 14 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
- ABB Product Security Incident Response Team (PSIRT): 5 affected or under-investigation product states without a fixed product state in the same current advisory
- Schneider Electric CPCERT: 9 affected or under-investigation product states without a fixed product state in the same current advisory
Direct vendor intelligence
5 currentAuthoritative 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.
SEVD-2023-192-04 · CSAF 2.0 · revision 8.1.0 · finalSchneider Electric CPCERTCODESYS Runtime Vulnerabilities
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 LMC078 All Versions
- 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 Modicon Controller M218 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
- Summary
- In addition to the functionality described above, there are memory access functions that allow the PLC application code to read or write memory. These are not limited to the data memories that are assigned to it or allocated by it. For this reason, the PLC application code can potentially access the entire RAM memory of the CODESYS Control runtime process surrounding it. This could allow PLC programmers who have successfully authenticated themselves at the controller to execute PLC application code that can modify itself or read or write sensitive data of the CODESYS Control runtime process.
- 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.
9AKK108470A9989 · CSAF 2.0 · revision 1 · finalABB Product Security Incident Response Team (PSIRT)CVE-2022-4046
The vendor explicitly identifies these products as affected by this CVE.
- ACS6080 Firmware Version >=LAAAA 2.10.0|<=LAAAB 5.06.1
- ACS5000 Firmware Version >=LAAAB 4.03.0|<= LAAAB 5.06.1
- ACS6000 Firmware Version >=LAAAA 2.10.0|<=LAAAB 5.06.1
- Summary
- The CODESYS Control runtime system does not restrict the memory access. An improper restriction of operations within the bounds of a memory buffer allows an attacker with access to the drive with user privileges to gain full access of the drive.
- Remediation
- ABB recommends that customers apply a firmware update as soon as possible to the latest firmware, i.e. LAAAB v. 5.07 and higher, for the affected products. ABB has addressed the CODESYS Runtime System vulnerabilities by disabling the IEC online programming communication by default. As a result, CODESYS communication between affected products and the ABB Automation Builder or ABB Drive Application Builder tools is disabled. It should be noted that the CODESYS application continues to run on the Drive and if it is necessary to establish communication with CODESYS RTS, for example to debug the CODESYS application, this is possible through the drive parameter configuration. Open the user lock via the "96.02 Pass code" parameter and make sure that bit 9 "Enable online IEC programming" is set to TRUE in the "96.102 User lock functionality" parameter. IMPORTANT: After this task, be sure to disable CODESYS communication by setting the bit back to FALSE. A future firmware update is planned to update the CODESYS RTS library, which will further strengthen defenses for the vulnerabilities mentioned above. For situations where firmware update is not feasible, please refer to “Workarounds” section.
9AKK108470A9491 · CSAF 2.0 · revision 2 · finalABB Product Security Incident Response Team (PSIRT)CVE-2022-4046
The vendor explicitly identifies these products as affected by this CVE.
- ACS880 Primary Control Program AINLX < v3.47
- ACS880 Primary Control Program YINLX < v1.30
- ACS880 IGBT Supply Control Program AISLX < v3.43
- ACS880 IGBT Supply Control Program ALHLX < v3.43
- ACS880 IGBT Supply Control Program YISLX < v1.30
- ACS880 IGBT Supply Control Program YLHLX < v1.30
- ACS880 Position Control Program APCLX <= v1.04.0.5
- ACS880 Test Bench Control Program ATBLX <= v3.44.0.0
- Summary
- In CODESYS Control in multiple versions a improper restriction of operations within the bounds of a memory buffer allow an remote attacker with user privileges to gain full access of the device.
- Remediation
- In latest firmware versions for the affected products, ABB has mitigated the CODESYS Runtime System vulnerabilities. IEC online programming communication is disabled by default. As a result, CODESYS tools communication with the drive is disabled. ABB recommends that customers apply the firmware update at earliest convenience. For situations where firmware update is not feasible, please refer to ‘Workarounds’ section guidance
9AKK108470A9494 · CSAF 2.0 · revision 2 · finalABB Product Security Incident Response Team (PSIRT)CVE-2022-4046
The vendor explicitly identifies these products as affected by this CVE.
- DCS880 memory unit incl. ABB Drive Application Builder license (IEC 61131-3)
- DCS880 memory unit incl. DEMag
- DCS880 memory unit incl. DCC
- DCT880 memory unit incl. ABB Drive Application Builder license (IEC 61131-3)
- DCT880 memory unit incl. Power Optimizer
- Summary
- In CODESYS Control in multiple versions a improper restriction of operations within the bounds of a memory buffer allow an remote attacker with user privileges to gain full access of the device.
- Remediation
- If the drive or power controller is in an exploitable configuration, ABB recommends immediately applying the mitigations described in the Workarounds section.
SEVD-2023-101-01 · CSAF 2.0 · revision 2.0.0 · finalSchneider Electric CPCERTCODESYS Runtime Vulnerabilities
The vendor explicitly identifies these products as affected by this CVE.
- Schneider Electric PacDrive 3 Controllers: LMC Eco/Pro/Pro2 All Versions
- Schneider Electric PacDrive Controller LMC078 All Versions
- Schneider Electric Modicon Controller M241 All Versions
- Schneider Electric Modicon Controller M251 All Versions
- Schneider Electric Modicon Controller M262 All Versions
- Schneider Electric Modicon Controller M258 All Versions
- Schneider Electric Modicon Controller LMC058 All Versions
- Schneider Electric Modicon Controller M218 All Versions
- Schneider Electric HMISCU Controller All Versions
- Summary
- Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability exists that could cause loss of view, modification of view, loss of control, and denial of control when Integrity check fails to identify out-of-band logic changes.
- Remediation
- Schneider Electric is establishing a remediation plan for all future versions that will include a fix for these vulnerabilities. We will update this document when the remediations are available. Until then, customers should immediately apply the following mitigations to reduce the risk of exploitation. • The “Cybersecurity Guidelines for EcoStruxure Machine Expert, Modicon and PacDrive Controllers and Associated Equipment” provide mitigations through the activation of project encryption in the Enhanced Security Settings, chapter https://download.schneider-electric.com/files?p_enDocType=User+guide&p_File_Name=EIO0000004242.00.pdf&p_Doc_Ref=EIO0000004242 • Restrict access to programming ports, typically UDP/1740, TCP/11740 and TCP/1105. • Enable the optional ‘Implicit Checks’ on logic applications. • Avoid use of the POINTER data type and MEMMOVE instructions, especially on untrusted inputs. • Use controllers and devices only in a protected environment to minimize network exposure and ensure that they are not accessible from outside. • Use firewalls to protect and separate the control system network from other networks. • Use VPN (Virtual Private Networks) tunnels if remote access is required. • Activate and apply user management and password features. • Use encrypted communication links. • Limit the access to both development and control system by physical means, operating system features, etc. • Protect both development and control system by using up to date malware protection. To ensure you are informed of all updates, including details on affected products and remediation plans, subscribe to Schneider Electric’s security notification service here: https://www.se.com/en/work/support/cybersecurity/security-notifications.jsp
High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 14 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
Fix availability varies by product01
What, why and how
In CODESYS Control in multiple versions a improper restriction of operations within the bounds of a memory buffer allow an remote attacker with user privileges to gain full access of the device.
What
In CODESYS Control in multiple versions a improper restriction of operations within the bounds of a memory buffer allow an remote attacker with user privileges to gain full access of the device.
Why
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
How
An attacker operating through a network path 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 Control in multiple versions a improper restriction of operations within the bounds of a memory buffer allow an remote attacker with user privileges to gain full access of the device.
Why
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
How
An attacker operating through a network path 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 No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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 None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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 → Improper Restriction of Operations within the Bounds of a Memory Buffer → cause the confidentiality, integrity or availability impact described by the vendor
- Attack surface
- Network
- Privileges required
- Low: a basic authenticated account is required
- 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-119 ↗
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer. The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
- 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:L/UI:N/S:U/C:H/I:H/A:HCommon 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.PRLowPrivileges required: The attacker needs basic user-level 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.AHighAvailability impact: A successful attack can cause a major loss.- Post-exploitation / living off the land
- No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
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. - Fix availability varies by product
- Affected
- Schneider Electric HMISCU Controller All versions prior to v6.3.1
- Schneider Electric Modicon Controller LMC078 All Versions
- 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 Modicon Controller M218 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
- Schneider Electric Easy Modicon M310 All versions prior to v3.1.5.82
- Schneider Electric Vijeo Designer runtime Versions Prior to 6.3 SP2 installed on Schneider Electric Harmony iPC series
- Schneider Electric Vijeo Designer runtime Versions Prior to 6.3 SP2 installed on Schneider Electric Harmony P6 series
- Fixed
- Schneider Electric HMISCU Controller 6.3.1
- Schneider Electric Modicon Controller M241 5.2.11.18
- Schneider Electric Modicon Controller M251 5.2.11.18
- Schneider Electric Modicon Controller M262 5.2.8.12
- Schneider Electric PacDrive 3 Controllers: LMC Eco/Pro/Pro2 1.76.14.1
- Schneider Electric SoftSPS embedded in EcoStruxure™ Machine Expert 2.2
- Schneider Electric Vijeo Designer embedded in EcoStruxure™ Machine Expert 6.3.1
- Schneider Electric Harmony (Formerly Magelis) HMIGK/HMIGTO/HMIGTU/HMIGTUX/HMISTU series iPC series with Vijeo Designer runtime V6.3 HF3
- Vijeo Designer Basic v2.0 HF2
- Schneider Electric Vijeo Designer runtime Version 6.3 SP2 installed on Schneider Electric Harmony iPC series
- Schneider Electric Vijeo Designer runtime Version 6.3 SP2 installed on Schneider Electric Harmony P6 series
- Schneider Electric Easy Modicon M310 version v3.1.5.82
- Action
- Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
- 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 29 May 2026, 14:06 UTC · CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-08-14
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2022-51423
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
View recent updates ↗What changed after publication
- Affected versionsThe structured affected or fixed version information changed.Schneider Electric CPCERT ↗
- Before
- all · Fixed: No fixed version is explicitly recorded in the structured CVE data.
- After
- all · 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.
- Remediation statusRemediation status changed from Mitigation available to Patch available.Schneider Electric CPCERT ↗
- Before
- Mitigation available
- After
- Patch available
- Vendor guidanceAuthoritative vendor guidance changed: added remediation: search.abb.com/Download.aspx?DocumentID=9AKK108470A9989&LanguageCode=en&DocumentPartId=pdf&Action=Launch; removed remediation: nvd.nist.gov/CVE-2022-4046.ABB Product Security Incident Response Team (PSIRT) ↗
- Before
- remediation: nvd.nist.gov/CVE-2022-4046
- After
- remediation: search.abb.com/Download.aspx?DocumentID=9AKK108470A9989&LanguageCode=en&DocumentPartId=pdf&Action=Launch
- Vendor guidanceAuthoritative vendor guidance changed: added remediation: search.abb.com/Download.aspx?DocumentID=9AKK108470A9491&LanguageCode=en&DocumentPartId=pdf&Action=Launch; removed remediation: nvd.nist.gov/CVE-2022-4046.ABB Product Security Incident Response Team (PSIRT) ↗
- Before
- remediation: nvd.nist.gov/CVE-2022-4046
- After
- remediation: search.abb.com/Download.aspx?DocumentID=9AKK108470A9491&LanguageCode=en&DocumentPartId=pdf&Action=Launch
- Vendor guidanceAuthoritative vendor guidance changed: added remediation: search.abb.com/Download.aspx?DocumentID=9AKK108470A9494&LanguageCode=en&DocumentPartId=pdf&Action=Launch; removed remediation: nvd.nist.gov/CVE-2022-4046.ABB Product Security Incident Response Team (PSIRT) ↗
- Before
- remediation: nvd.nist.gov/CVE-2022-4046
- After
- remediation: search.abb.com/Download.aspx?DocumentID=9AKK108470A9494&LanguageCode=en&DocumentPartId=pdf&Action=Launch
CVE published
Mitigation reference recorded
Fixed release recorded from official guidance
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.