Severity by source
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:L/U:Green
Local access with low-privilege account required to trigger the bypass; high integrity impact reflects DCS configuration write access; confidentiality and availability impacts are limited and secondary.
Primary rating from Vendor (ABB).
CVSS VectorVendor: ABB
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:L/U:Green
Lifecycle Timeline
2DescriptionCVE.org
Authentication bypass by primary weakness vulnerability in ABB Freelance.
This issue affects Freelance: through 2013, 2013 SP1, 2016, 2016 SP1, 2019, 2019 SP1, 2019 SP1 FP1, 2024.
AnalysisAI
Authentication bypass via primary weakness (CWE-305) in ABB Freelance DCS affects every major release line from 2013 through 2024, allowing a locally authenticated low-privilege user to circumvent the product's authentication mechanism and gain elevated control over the system. The CVSS vector (AV:L/PR:L/I:H) confirms the attacker must already hold a foothold on the host but can then achieve high integrity impact - particularly serious in an industrial control system context where manipulating controller configurations can affect physical processes. No public exploit code and no CISA KEV listing have been identified at time of analysis, though the wide version span and OT deployment context elevate remediation urgency.
Technical ContextAI
ABB Freelance is a Distributed Control System (DCS) platform used in industrial process automation environments. The affected CPE (cpe:2.3:a:abb:freelance:*:*:*:*:*:*:*:*) spans all tracked versions through the 2024 release, indicating a pervasive architectural flaw rather than an isolated regression. CWE-305 (Authentication Bypass by Primary Weakness) describes a condition where the primary authentication mechanism itself is flawed - distinct from secondary control bypasses - meaning the intended authentication logic can be circumvented directly rather than by sidestepping a peripheral check. In an ICS/DCS context, authentication gates protect access to engineering workstations, controller configurations, function block programming, and runtime parameter adjustments; a bypass here enables actions that operators at a low-privilege tier should not be able to perform.
RemediationAI
Consult ABB's official advisory (Document ID 7PAA020361, https://search.abb.com/library/Download.aspx?DocumentID=7PAA020361&LanguageCode=en&DocumentPartId=&Action=Launch) for vendor-released patches or hotfixes - exact patched version numbers are not available in the current intelligence data and should not be inferred. While awaiting patching, restrict local access to Freelance engineering workstations to only explicitly authorized personnel by enforcing OS-level account controls and removing or disabling low-privilege accounts that do not require DCS access. Implement network segmentation to reduce the number of systems from which an attacker could pivot to a Freelance workstation. Enable audit logging for DCS configuration changes to detect unauthorized modifications even if a bypass is exploited. Note that OS-level access controls are a compensating control, not a substitute for patching, since the bypass exists within the Freelance application authentication layer itself.
Multiple stack-based buffer overflows in RobNetScanHost.exe in ABB Robot Communications Runtime before 5.14.02, as used
Unauthorized file access in WEB Server in ABB ASPECT - Enterprise v3.08.01; NEXUS Series v3.08.01 ; MATRIX Series v3.08.
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The ABB IDAL HTTP server mishandles format strings in a username or cookie during the authentication process. Rated high
The ABB IDAL HTTP server is vulnerable to a buffer overflow when a long Host header is sent in a web request. Rated high
The ABB IDAL FTP server mishandles format strings in a username during the authentication process. Rated high severity (
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The HMISimulator component of ABB PB610 Panel Builder 600 uses the readFile/writeFile interface to manipulate the work f
Same weakness CWE-305 – Authentication Bypass by Primary Weakness
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today
EUVD-2025-210109
GHSA-385f-mwvx-qwq5