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CVE-2026-54204 – Unauthenticated SSRF (UNC Path / NTLM Credential Theft) – Tobit David (Webbox) thro

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Summary

CVE-2026-54204 is an unauthenticated Server-Side Request Forgery (SSRF) vulnerability in the Webbox component of Tobit Laboratories AG’s David. The search functionality accepts a pathnameroot parameter that can be pointed to external UNC paths, forcing the server to open outbound SMB connections to attacker-controlled hosts. It is rated HIGH severity (CVSS 7.7).

Technical details

  • Root cause: The Webbox search functionality processes the pathnameroot parameter without validating the supplied file path (CWE-20 / CWE-918).
  • Trigger conditions: An attacker supplies a UNC path (e.g. \Attacker-IPShare) via the pathnameroot parameter. The functionality is reachable without authentication.
  • Attack vector: Network — no authentication or user interaction required.
  • Impact: The server is coerced into authenticating to an arbitrary SMB endpoint on port 445, exposing NetNTLM authentication material and enabling credential capture or SMB relay attacks.

Affected software

  • Tobit Laboratories AG David (Webbox module) — all versions through Rollout 524.

Severity

  • CVSS v4.0 Base Score: 7.7 (HIGH)
  • Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
  • A CVSS v3.1 vector has not been published by NVD for this CVE at the time of writing.

Mitigation and recommended actions

  • Immediate: Upgrade David/Webbox to a release later than Rollout 524, per the vendor release notes.
  • If no patch can be applied: Restrict outbound SMB (TCP/445) connections from the server to prevent it from authenticating to external hosts, and limit network exposure of the Webbox interface.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Server response header: David-WebBox
  • Page title: David InfoCenter Web

References

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