CVE-2021-35247— Improper Input Validation Vulnerability in Serv-U
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I. Basic Information for CVE-2021-35247
Vulnerability Information
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Vulnerability Title
Improper Input Validation Vulnerability in Serv-U
Source: NVD (National Vulnerability Database)
Vulnerability Description
Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sanitized. SolarWinds has updated the input mechanism to perform additional validation and sanitization. Please Note: No downstream affect has been detected as the LDAP servers ignored improper characters. To insure proper input validation is completed in all environments. SolarWinds recommends scheduling an update to the latest version of Serv-U.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Solarwinds Serv-U Web Client 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Solarwinds Serv-U Web Client是美国SolarWinds（Solarwinds）公司的一种基于 HTTP 的文件传输客户端，可供许可 Serv-U 文件服务器上的所有用户使用。 Solarwinds Serv-U Web Client 存在输入验证错误漏洞，该漏洞源于Serv-U web登录界面允许没有被认证机制消毒的字符。
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)
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Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| SolarWinds | Serv-U | 15.2.5 and previous versions ~ 15.3 | - |
II. Public POCs for CVE-2021-35247
| # | POC Description | Source Link | Shenlong Link |
|---|
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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-2021-35247
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