CVE-2021-35247
SolarWinds Serv-U Improper Input Validation Vulnerability
Summary
SolarWinds Serv-U versions 15.2.5 and earlier contain an improper input validation vulnerability that allows attackers to build and send queries without sanitization.
Affected software
Vendor: SolarWinds · Product: Serv-U
Weakness types (CWE):
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in SolarWinds
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2024-28995 | SolarWinds Serv-U Path Traversal Vulnerability | 99.6% | Yes |
| CVE-2024-28987 | SolarWinds Web Help Desk Hardcoded Credential Vulnerability | 93.3% | Yes |
| CVE-2020-10148 | SolarWinds Orion Authentication Bypass Vulnerability | 92.0% | Yes |
| CVE-2021-35211 | SolarWinds Serv-U Remote Code Execution Vulnerability | 91.2% | Yes |
| CVE-2025-26399 | SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability | 88.3% | Yes |
| CVE-2024-28986 | SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability | 84.6% | Yes |
| CVE-2025-40551 | SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability | 83.6% | Yes |
| CVE-2025-40536 | SolarWinds Web Help Desk Security Control Bypass Vulnerability | 71.5% | Yes |
Is your domain exposed?
Run a free, instant security report for any domain — exposure score, email auth, TLS and breach metadata.
Get your free reportAll information is aggregated from public sources for awareness only and does not constitute an accusation or a security assessment. No personal data or credentials are published.