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CVE-2026-54224— Denial of Service in UBB.threads

Quick assessment

Affected
UBB Systems UBB.threads
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.

UBB Systems UBB.threads是UBB Systems社区的一个论坛软件系统。 UBB Systems UBB.threads 7.7.5及之前版本存在资源管理错误漏洞，该漏洞源于资源管理错误，可能导致经过身份验证的攻击者通过发送多个并发请求查看用户配置文件，轻松耗尽数据库资源，完全拒绝其他用户访问应用程序。

AI Predicted 6.5 Difficulty: Easy EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
UBB Systems UBB.threads ≤ 7.7.5 affected
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I. Basic Information for CVE-2026-54224

Vulnerability Information
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Vulnerability Title
Denial of Service in UBB.threads
Source: CVE Program / CVE List V5
Vulnerability Description
UBB.threads is vulnerable to Denial of Service (DoS). By sending multiple concurrent requests to view any user profile on instances with many registered users, an authenticated attacker can easily exhaust database resources and completely deny access to the application for other users. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 7.7.5 but may also affect other versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不对称的资源消耗(放大攻击)
Source: CVE Program / CVE List V5
Vulnerability Title
UBB Systems UBB.threads 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
UBB Systems UBB.threads是UBB Systems社区的一个论坛软件系统。 UBB Systems UBB.threads 7.7.5及之前版本存在资源管理错误漏洞，该漏洞源于资源管理错误，可能导致经过身份验证的攻击者通过发送多个并发请求查看用户配置文件，轻松耗尽数据库资源，完全拒绝其他用户访问应用程序。
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
UBB Systems UBB.threads 0 ~ 7.7.5 -

II. Public POCs for CVE-2026-54224

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III. Intelligence Information for CVE-2026-54224

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Security Blog Posts for CVE-2026-54224 (1)

Same Patch Batch · UBB Systems · 2026-06-18 · 6 CVEs total

CVE-2026-54221 Reflected XSS in UBB.threads
CVE-2026-54222 Blind SQL Injection in UBB.threads
CVE-2026-54219 Stored XSS in UBB.threads
CVE-2026-54223 Remote Code Execution via arbitrary file read and write in UBB.threads
CVE-2026-54220 Cross-Site Request Forgery in UBB.threads

IV. Related Vulnerabilities

Same product: UBB.threads
Same vendor: UBB Systems
Same weakness: CWE-405

V. Comments for CVE-2026-54224

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