CVE-2026-54206 TeamDavid: Server-Side Request Forgery (SSRF) via 'pathname' parameter in sending functionality
Unauthenticated attackers can trigger SSRF via UNC paths to steal NTLM hashes or relay SMB connections, requiring disabling the feature or upgrading.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-54206?
CVE-2026-54206 is a medium-severity server-side request forgery vulnerability in Tobit Laboratories AG TeamDavid, published on 7 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Tobit Laboratories AG TeamDavid's Webbox 's sending email, fax, SMS, etc. functionality accepts a @@INCLUDE command, which can be set to network locations using UNC paths (e.g., “\\Server\Share”). The server processes these paths without validation, resulting in outbound connection attempts to attacker-controlled SMB servers. This enables authenticated attackers to trigger the server to authenticate to arbitrary SMB endpoints, potentially exposing NTLM authentication information (such as NTLM hashes). If outbound connections to port 445 (SMB) are permitted, attackers can use this to conduct SMB relay or credential theft attacks. Exploitation of the “pathname” parameter is possible without 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.
Which versions are affected by CVE-2026-54206?
How do I fix CVE-2026-54206?
No fix has been published for CVE-2026-54206 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-54206 being exploited?
There is no known exploitation of CVE-2026-54206 in the wild and no public exploit code.
Sources
Also known as GHSA-9q86-rqgf-5jcm.