EUVD-2026-42031
GHSA-63cg-fqr3-853j
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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:Y/R:U/V:X/RE:M/U:Amber
Local filesystem read by a low-privileged user; only confidentiality is impacted as credential files are read but no modification or service disruption occurs.
Primary rating from Vendor (arcinfo).
CVSS VectorVendor: arcinfo
Lifecycle Timeline
3DescriptionCVE.org
Credentials of built-in users are insecurely stored in the User directory of PcVue projects, all versions prior to 17.0.0. A local attacker could retrieve users’ credentials.
Active Directory accounts are not affected by this vulnerability.
AnalysisAI
Insecure credential storage in PcVue exposes built-in user account passwords to any local attacker with low-privileged filesystem access, across all versions prior to 17.0.0. The credentials are stored unprotected in the project's User directory, recoverable without elevated OS privileges. No public exploit code has been identified at time of analysis, but in OT/SCADA environments where PcVue is deployed, recovered credentials could enable unauthorized control of industrial processes.
Technical ContextAI
PcVue is an industrial SCADA/HMI platform by Arc Informatique (CPE: cpe:2.3:a:arcinfo:pcvue:*:*:*:*:*:*:*:*). The root cause is CWE-256 (Plaintext Storage of a Password), meaning built-in user credentials are stored without adequate cryptographic protection - either in cleartext or using a reversible encoding - inside the PcVue project's User directory on the local filesystem. The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:L) confirms the directory is readable by low-privileged OS users with no special attack prerequisites. PcVue supports both built-in user accounts and Active Directory integration; the vendor explicitly notes that Active Directory-backed accounts use a separate authentication path and are not exposed by this flaw.
RemediationAI
Upgrade PcVue to version 17.0.0 or later, which resolves the insecure credential storage for built-in users per vendor advisory SB2026-5 at https://www.pcvue.com/security/#SB2026-5. Where immediate patching is not possible, apply restrictive filesystem ACLs on the PcVue project's User directory to prevent read access by non-administrative OS accounts - note this may interfere with PcVue runtime operations and requires testing before production deployment. As a structural mitigation, consider migrating built-in user accounts to Active Directory integration, which is explicitly not affected by this vulnerability; this also provides centralized credential management and audit logging. Audit current local OS user accounts on PcVue hosts to enforce least-privilege access.
ARC Informatique PcVue prior to version 12.0.17 is vulnerable due to the deserialization of untrusted data, which may al
Privilege escalation in ARC Informatique PcVue SCADA/HMI software (all versions prior to 17.0.0) arises because the encr
ARC Informatique PcVue prior to version 12.0.17 is vulnerable to a denial-of-service attack due to the ability of an una
ARC Informatique PcVue prior to version 12.0.17 is vulnerable to information exposure, allowing unauthorized users to ac
An insertion of sensitive information into log file vulnerability exists in PcVue versions 15 through 15.2.2. Rated medi
The affected device stores sensitive information in cleartext, which may allow an authenticated user to access session d
A cleartext storage of sensitive information vulnerability exists in PcVue versions 8.10 through 15.2.3. Rated medium se
Cross-site scripting (XSS) in PcVue's OAuth error page (versions 12.0.0-16.3.3) allows remote attackers to inject malici
PcVue versions 15.0.0 through 16.3.3 are vulnerable to HTTP Host header injection in the WebClient and WebScheduler auth
PcVue versions 12.0.0 through 16.3.3 use the deprecated OAuth Resource Owner Password Credentials flow in their web serv
PcVue versions 12.0.0 through 16.3.3 lack origin validation on WebSocket connections in the GraphicalData service, enabl
PcVue versions 12.0.0 through 16.3.3 lack Secure and SameSite cookie attributes in the GraphicalData web services and We
Same weakness CWE-256 – Plaintext Storage of a Password
View allSame technique Information Disclosure
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External POC / Exploit Code
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