HTTP Host header vulnerability in WebClient and WebScheduler web apps
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
A HTTP Host header attack vulnerability affects WebClient and the WebScheduler web apps of PcVue in version 15.0.0 through 16.3.3 included, allowing a remote attacker to inject harmful payloads that manipulate server-side behavior. This vulnerability only affects the endpoints /Authentication/ExternalLogin, /Authentication/AuthorizationCodeCallback and /Authentication/Logout of the WebClient and WebScheduler web apps.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-1698
- 2026-10-03 Alias added: GHSA-35x7-r658-wx7f
References
Advisory 1
More arcinfo Pcvue vulnerabilities
- TI-2011-03570 Integer overflow in an unspecified ActiveX control in SVUIGrd.ocx in ARC Informatique… CVSS 2.0HIGH 9.3
- TI-2011-03569 An unspecified ActiveX control in SVUIGrd.ocx in ARC Informatique PcVue 6.0 through 10.0… CVSS 2.0HIGH 9.3
- TI-2020-16302 ARC Informatique PcVue Deserialization of Untrusted Data CVSS 3.1CRITICAL 9.8
- TI-2011-03571 An unspecified ActiveX control in SVUIGrd.ocx in ARC Informatique PcVue 6.0 through 10.0… CVSS 2.0MEDIUM 5.8
- TI-2026-12536 Weak encryption mechanism for User directory CVSS 4.0HIGH 8.4
- TI-2020-16303 ARC Informatique PcVue Access to Critical Private Variable via Public Method CVSS 3.1HIGH 7.5
Sources
- CVE-2026-1698 · CVE Program
- CVE-2026-1698 · NVD
- FIRST EPSS
- GHSA-35x7-r658-wx7f · GitHub Advisory Database · CC BY 4.0
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