ACTIVELY EXPLOITED
CVE-2021-35211: SolarWinds Serv-U Remote Code Execution Vulnerability
| Vendor | SolarWinds |
|---|---|
| Product | Serv-U |
| Actively exploited | Yes |
| Added to CISA KEV | 3 Nov 2021 |
| CISA federal deadline | 17 Nov 2021 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-787 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
SolarWinds Serv-U contains an unspecified memory escape vulnerability which can allow for remote code execution.
SOURCES
Other SolarWinds flaws
- CVE-2026-28318: SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability
- CVE-2025-26399: SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
- CVE-2025-40536: SolarWinds Web Help Desk Security Control Bypass Vulnerability
- CVE-2025-40551: SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
- CVE-2024-28987: SolarWinds Web Help Desk Hardcoded Credential Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.