What’s Vulnerable › Vulnerabilities

CVE-2026-54211: TeamDavid: Buffer Overflow in multiple form data parameters

• Severity: critical (CVSS 9.5 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% 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’s endpoint “//serverClient_close.html” is vulnerable to a buffer overflow vulnerability in multiple form data parameters. By submitting excessively long values in these parameters, an authenticated attacker can trigger a server 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 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.

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

• 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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