CVE-2026-54203

Critical

Description

Memory Leak to an Unauthorized Actor vulnerability in Tobit Laboratories AG TeamDavid's Webbox allows reading of sensitive information. When accessing the URL “/.well-known/mta-sts.”, the application responds with memory. By repeatedly requesting this endpoint, an attacker can access sensitive information, including user passwords. Exploitation does not require authentication. 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.

SeverityCritical

CVSS9.2

Exploit probability—

ProductTeamDavid

PublishedAug 7, 2026

First seenAug 7, 2026

Weakness typeCWE-200Sensitive information exposure

How to fix

Update

Tobit Laboratories AG TeamDavidRollout 528 or later

Vendor advisories

chayns.net/77892-10814/tapp/763210?postId=11454

Affected products

Product	Affected versions	Fixed in
Tobit Laboratories AG TeamDavid	v < Rollout 528	Rollout 528

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