CVE-2026-54203TeamDavid: Memory Leak leaking sensitive information
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.2 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
- Weakness (CWE)
- CWE-200
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- NCSC.ch
- NVD analysis
- Deferred
- Record last updated
- Sep 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Tobit Laboratories AG TeamDavid tobit_laboratories:teamdavid (from the name) | before Rollout 528 | CNA record |
References
- https://chayns.net/77892-10814/tapp/763210?postId=11454release-notes
- https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.