Security readout for executives and security teams
Plain-English summary
PcVue has a medium-severity cross-site scripting issue in OAuth error handling. A remote attacker may trick a legitimate user into loading content from another site after an unsuccessful authentication attempt involving an unknown client_id. The issue is limited to the OAuth server error page.
Executive priority
Treat as a moderate-priority remediation item, especially for internet-accessible PcVue environments. The issue is not reported as actively exploited, but it affects authentication-adjacent web components in industrial software and should be tracked through normal vulnerability management.
Technical view
CVE-2026-1695 is CWE-79 affecting OAuth web services used by PcVue WebVue, WebScheduler, TouchVue, and SnapVue. Versions 12.0.0 through 16.3.3 are listed as affected. CVSS v4.0 score is 5.3. Exploitation requires user interaction and impacts confidentiality, integrity, and availability at low levels.
Likely exposure
Organizations using PcVue 12.0.0 through 16.3.3 with OAuth-backed WebVue, WebScheduler, TouchVue, or SnapVue features may be exposed. Exposure is most relevant where users can reach the OAuth authentication flow and error page.
Exploitation context
No active exploitation is indicated in the provided sources, and the CVE is not listed as KEV. The attack scenario depends on tricking a legitimate user and occurs on unsuccessful authentication for an unknown application/client_id.
Researcher notes
Evidence states the vulnerability only affects the OAuth server error page. The source bundle does not provide exploit details, fixed versions, or specific mitigations beyond the vendor advisory reference. Avoid assuming impact outside the listed PcVue features and versions.
Mitigation direction
- Review PcVue security advisory SB2026-2 for official remediation guidance.
- Inventory PcVue deployments and identify versions 12.0.0 through 16.3.3.
- Restrict access to PcVue OAuth interfaces where operationally feasible.
- Educate users not to follow unexpected authentication links.
- Monitor vendor guidance for patches or configuration mitigations.
Validation and detection
- Confirm whether WebVue, WebScheduler, TouchVue, or SnapVue are enabled.
- Check deployed PcVue versions against 12.0.0 through 16.3.3.
- Review OAuth server logs for unusual failed authentication requests.
- Verify remediation status against the vendor advisory.
- Document whether OAuth error pages are externally reachable.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-1695 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N/AU:Y/R:U/RE:M/U:Clear
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N/AU:Y/R:U/RE:M/U:Clear——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
5.3MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N/AU:Y/R:U/RE:M/U:Clear
Source materials
- CVE List V5 sourceCVE List V5
- https://www.pcvue.com/security/#SB2026-2CVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.