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

Quick assessment

Affected
Tobit Laboratories AG TeamDavid
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tobit Laboratories TeamDavid WebBox是Tobit Laboratories公司的一个提供邮件、消息及存档数据远程访问功能的独立Web服务器模块。 Tobit Laboratories TeamDavid WebBox 524及之前版本存在缓冲区错误漏洞，该漏洞源于//serverClient_close.html端点中多个表单数据参数存在缓冲区溢出，可能导致经过身份验证的攻击者提交超长值触发服务器崩溃，造成拒绝服务，甚至远程代码执行。

CVSS 9.5 · Critical EPSS 0.64% · P49

Affected Version Matrix 1

VendorProduct Version RangeStatus
Tobit Laboratories AG TeamDavid < Rollout 528 affected
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I. Basic Information for CVE-2026-54211

Vulnerability Information
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Vulnerability Title
TeamDavid: Buffer Overflow in multiple form data parameters
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Tobit Laboratories TeamDavid WebBox 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tobit Laboratories TeamDavid WebBox是Tobit Laboratories公司的一个提供邮件、消息及存档数据远程访问功能的独立Web服务器模块。 Tobit Laboratories TeamDavid WebBox 524及之前版本存在缓冲区错误漏洞，该漏洞源于//serverClient_close.html端点中多个表单数据参数存在缓冲区溢出，可能导致经过身份验证的攻击者提交超长值触发服务器崩溃，造成拒绝服务，甚至远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Tobit Laboratories AG TeamDavid 0 ~ Rollout 528 -

II. Public POCs for CVE-2026-54211

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III. Intelligence Information for CVE-2026-54211

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Vendor Pages for CVE-2026-54211 (1)

Other References for CVE-2026-54211 (1)

Same Patch Batch · Tobit Laboratories AG · 2026-08-07 · 22 CVEs total

CVE-2026-54210 9.5 CRITICAL TeamDavid: Buffer Overflow in file names of file upload functionalities
CVE-2026-54212 9.5 CRITICAL TeamDavid: Buffer Overflow in JSON-parsing
CVE-2026-54213 9.2 CRITICAL TeamDavid: Denial of Service via endpoint 'internalRestart'
CVE-2026-54203 9.2 CRITICAL TeamDavid: Memory Leak leaking sensitive information
CVE-2026-54209 8.9 HIGH TeamDavid: Buffer Overflow in 'editini' function
CVE-2026-54218 8.8 HIGH TeamDavid: Weak Cryptography and Insecure Password Storage
CVE-2026-54202 8.5 HIGH TeamDavid: Path Traversal in the archive creation functionality
CVE-2026-54208 8.5 HIGH TeamDavid: Arbitrary File Write leading to Stored XSS
CVE-2026-12070 8.4 HIGH TeamDavid: Arbitrary File Deletion via form field 'scjob'
CVE-2026-54200 8.4 HIGH TeamDavid: Local File Inclusion via the form field 'scjob'
CVE-2026-54204 7.7 HIGH TeamDavid: Server-Side Request Forgery (SSRF) via 'pathnameroot' parameter in search funct
CVE-2026-54201 6.9 MEDIUM TeamDavid: Missing Authorization
CVE-2026-54205 6.3 MEDIUM TeamDavid: Server-Side Request Forgery (SSRF) via 'pathname' parameter in link storing fun
CVE-2026-54206 6.3 MEDIUM TeamDavid: Server-Side Request Forgery (SSRF) via 'pathname' parameter in sending function
CVE-2026-54207 6.3 MEDIUM TeamDavid: Server-Side Request Forgery (SSRF) via 'pathname' parameter in move archive fun
CVE-2026-54215 5.3 MEDIUM TeamDavid: Open Redirect via the 'replyUrl' parameter
CVE-2026-54199 5.3 MEDIUM TeamDavid: Header Injection through request body in link storing functionality
CVE-2026-54214 5.3 MEDIUM TeamDavid: Header Injection through the 'cType' URL parameter
CVE-2026-54216 5.3 MEDIUM TeamDavid: Reflected Cross Site Scripting (XSS) via the 'EntryInfo' parameter
CVE-2026-54217 5.3 MEDIUM TeamDavid: Stored XSS in web application

Showing top 20 of 22 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: TeamDavid
Same vendor: Tobit Laboratories AG
Same weakness: CWE-787

V. Comments for CVE-2026-54211

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