CVE-2021-35223— Execute Command Function Allows Remote Code Execution (RCE)Vulnerability
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I. Basic Information for CVE-2021-35223
Vulnerability Information
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Vulnerability Title
Execute Command Function Allows Remote Code Execution (RCE)Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
The Serv-U File Server allows for events such as user login failures to be audited by executing a command. This command can be supplied with parameters that can take the form of user string variables, allowing remote code execution.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
SolarWinds Serv-U File Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SolarWinds Serv-U FTP Server是美国SolarWinds公司的一套FTP和MFT文件传输软件。 SolarWinds Serv-U File Server 存在安全漏洞，该漏洞源于。Server - u File Server允许通过执行命令来审计用户登录失败等事件。该命令可以提供用户字符串变量形式的参数，从而允许远程代码执行。
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 |
|---|---|---|---|---|
| SolarWinds | Serv-U | 15.2.3 and previous versions ~ 15.2.4 | - |
II. Public POCs for CVE-2021-35223
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · SolarWinds · 2021-08-31 · 9 CVEs total
| CVE-2021-35212 | 8.9 HIGH | Blind SQL injection Vulnerability |
| CVE-2021-35213 | 8.9 HIGH | Orion User setting Improper Access Control Privilege Escalation Vulnerability |
| CVE-2021-35220 | 8.1 HIGH | EmailWebPage Command Injection RCE |
| CVE-2021-35222 | 8.0 HIGH | Resource.aspx Reflected Cross-Site Scripting Vulnerability |
| CVE-2021-35239 | 7.5 HIGH | Stored XSS in Maps text box hyperlink Vulnerability |
| CVE-2021-35240 | 6.5 MEDIUM | Stored XSS via Help Server settings |
| CVE-2021-35221 | 6.3 MEDIUM | ImportAlert Improper Access Control Tampering Vulnerability |
| CVE-2021-35219 | 6.0 MEDIUM | ExportToPdfCmd Arbitrary File Read Information Disclosure Vulnerability |
IV. Related Vulnerabilities
Same product: Serv-U
- CVE-2025-40541
SolarWinds Serv-U Insecure Direct Object Reference (IDOR) Re - CVE-2025-40540
SolarWinds Serv-U Type Confusion Remote Code Execution Vulne - CVE-2025-40539
SolarWinds Serv-U Type Confusion Remote Code Execution Vulne - CVE-2025-40538
SolarWinds Serv-U Broken Access Control Remote Code Executio - CVE-2025-40549
SolarWinds Serv-U Path Restriction Bypass Vulnerability
Same vendor: SolarWinds
- CVE-2026-28298
SolarWinds Observability Self-Hosted Stored Cross-Site Scrip - CVE-2026-28297
SolarWinds Observability Self-Hosted Stored Cross-Site Scrip - CVE-2025-40541
SolarWinds Serv-U Insecure Direct Object Reference (IDOR) Re - CVE-2025-40540
SolarWinds Serv-U Type Confusion Remote Code Execution Vulne - CVE-2025-40539
SolarWinds Serv-U Type Confusion Remote Code Execution Vulne
Same weakness: CWE-20
V. Comments for CVE-2021-35223
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