Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 0.35% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2025
CVE-2024-12429High confidence
An attacker who successfully exploited these vulnerabilities could grant read access to files
ABB · AC500 V3
5.1MediumCVSS 4.0
Scheduled
Patch availableMedium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityMedium→Operational priority:Medium, unchanged from published severity.unchanged
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
- Confirm that the asset runs ABB AC500 V3 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.
Direct vendor intelligence
1 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.
3ADR011377 · CSAF 2.0 · revision 1 · finalABB Product Security Incident Response Team (PSIRT)CVE-2024-12429
The vendor explicitly identifies these products as affected by this CVE.
- AC500 V3 products (PM5xxx) < 3.8.0
- Summary
- AC500 V3 PLC has a slot for memory cards that can be used e.g. for logging purposes or for updating the firmware or the boot application. Because the AC500 V3 does not correctly validate the content of the memory card, a specifically crafted memory card can be used for directory traversal. A successfully authenticated attacker can use this vulnerability to read system-wide files and configuration
- Remediation
- The problem is corrected in AC500 V3 firmware version 3.8.0. ABB recommends that customers apply the update at earliest convenience. This firmware version is released for all AC500 V3 PLC types and available from Automation Builder 2.8.0.
Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.
Patch available01
What, why and how
An attacker who successfully exploited these vulnerabilities could grant read access to files. A vulnerability exists in the AC500 V3 version mentioned. A successfully authenticated attacker can use this vulnerability to read system wide files and configuration All AC500 V3 products (PM5xxx) with firmware version earlier than 3.8.0 are affected by this vulnerability.
What
An attacker who successfully exploited these vulnerabilities could grant read access to files. A vulnerability exists in the AC500 V3 version mentioned. A successfully authenticated attacker can use this vulnerability to read system wide files and configuration All AC500 V3 products (PM5xxx) with firmware version earlier than 3.8.0 are affected by this vulnerability.
Why
Attacker-controlled path data is not constrained to the intended directory before the application accesses a file.
How
An attacker operating through physical access may attempt exploitation when the stated preconditions are met. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
An attacker who successfully exploited these vulnerabilities could grant read access to files. A vulnerability exists in the AC500 V3 version mentioned. A successfully authenticated attacker can use this vulnerability to read system wide files and configuration All AC500 V3 products (PM5xxx) with firmware version earlier than 3.8.0 are affected by this vulnerability.
Why
Attacker-controlled path data is not constrained to the intended directory before the application accesses a file.
How
An attacker operating through physical access may attempt exploitation when the stated preconditions are met. 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
- physical access → Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') → cause the confidentiality, integrity or availability impact described by the vendor
- Attack surface
- Physical
- Privileges required
- None: unauthenticated exploitation is possible
- User interaction
- Passive interaction required
- Attack complexity
- Low: no specialised conditions are recorded
- Security boundary
- Not a CVSS 4.0 base metric
- Weakness
?
CWE means Common Weakness Enumeration: a standard category for the underlying weakness. - CWE-22 ↗
CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'). The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:NCommon Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.
AVPhysicalAttack vector: The attacker needs physical access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIPassiveUser interaction: A user must unknowingly interact with the vulnerable system.VCHighVulnerable-system confidentiality: A successful attack can cause a major loss.VINoneVulnerable-system integrity: No direct loss is represented by this metric.VANoneVulnerable-system availability: No direct loss is represented by this metric.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.- 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. - Patch available
- Action
- The problem is corrected in AC500 V3 firmware version 3.8.0. ABB recommends that customers apply the update at earliest convenience. This firmware version is released for all AC500 V3 PLC types and available from Automation Builder 2.8.0.
- Workaround
- No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04
Evidence and provenance
Published 7 Jan 2025 · Last source change 3 Nov 2025, 21:52 UTC · CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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-2024-50850
Product sourceVendor CSAF · ABB Product Security Incident Response Team (PSIRT)
Remediation sourceVendor CSAF · ABB Product Security Incident Response Team (PSIRT)
CWE sourceCNA
NVD statusNVD not scheduled
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.ABB Product Security Incident Response Team (PSIRT) ↗
- Before
- < 3.8.0 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
- After
- < 3.8.0 · Fixed: The problem is corrected in AC500 V3 firmware version 3.8.0. ABB recommends that customers apply the update at earliest convenience. This firmware version is released for all AC500 V3 PLC types and available from Automation Builder 2.8.0.
- Remediation statusRemediation status changed from Awaiting fix to Patch available.ABB Product Security Incident Response Team (PSIRT) ↗
- Before
- Awaiting fix
- After
- Patch available
- Vendor guidanceAuthoritative vendor guidance changed: added remediation: search.abb.com/Download.aspx?DocumentID=3ADR011377&LanguageCode=en&DocumentPartId=&Action=Launch; removed remediation: nvd.nist.gov/CVE-2024-12429.ABB Product Security Incident Response Team (PSIRT) ↗
- Before
- remediation: nvd.nist.gov/CVE-2024-12429
- After
- remediation: search.abb.com/Download.aspx?DocumentID=3ADR011377&LanguageCode=en&DocumentPartId=&Action=Launch
CVE published
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.