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CVE-2026-54212 – Unauthenticated Buffer Overflow (DoS, potential RCE) – Tobit David/TeamDavid Webbox

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Summary

CVE-2026-54212 is an unauthenticated buffer overflow (out-of-bounds write, CWE-787) in the Webbox module of Tobit Laboratories AG’s David (TeamDavid) application. A remote attacker can crash the server by sending a specially crafted JSON body to a vulnerable API endpoint, with potential for remote code execution. It is rated Critical (CVSS 9.5).

Technical details

  • Root cause: The Webbox application implements an API endpoint that parses JSON without proper bounds checking, leading to a buffer overflow (out-of-bounds write, CWE-787).
  • Trigger conditions: Submitting a specially crafted JSON body — described as at least 8 characters long and beginning with a number — to the affected endpoint.
  • Attack vector: Network, unauthenticated, no user interaction required.
  • Impact: The server crashes, resulting in denial of service. Per the disclosure, remote code execution is potentially possible if stack conditions are favorable or stack canaries can be bypassed.

Affected software

  • Tobit Laboratories AG David / TeamDavid (Webbox module), all versions through Rollout 524.

Severity

  • CVSS 4.0 base score: 9.5 (Critical)
  • Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Mitigation and recommended actions

  • Immediate: Update David/TeamDavid to a Rollout later than 524 per the vendor release notes.
  • If no patch: Restrict network access to the Webbox API endpoints, place the application behind a filtering reverse proxy or WAF that rejects malformed/oversized JSON request bodies, and limit exposure of the service to untrusted networks.

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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Map your entire attack surface (continously)

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4

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