CVE-2026-54212: TeamDavid: Buffer Overflow in JSON-parsing

Severity: critical (CVSS 9.5 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-07 · updated 2026-10-24
Weakness: CWE-787

Description

Tobit Laboratories AG TeamDavid's Webbox application implements an API endpoint that is vulnerable to a buffer overflow condition. By submitting a specially crafted JSON body, such as one that is at least 8 characters long and begins with a number, an unauthenticated attacker can cause the server to crash, resulting in denial of service. Depending on the stack state or if a stack canary can be disclosed through another vulnerability, this buffer overflow could potentially lead to remote code execution and 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.

Affected products

Tobit Laboratories AG TeamDavid: before Rollout 528 — fixed in Rollout 528

How to fix

Upgrade to a fixed version: Tobit Laboratories AG TeamDavid Rollout 528. Check the vendor advisory for mitigations.

References

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