SolarWinds — known exploited vulnerabilities
The CISA Known Exploited Vulnerabilities catalog (KEV) lists vulnerabilities that CISA has confirmed are being exploited in the wild; U.S. federal civilian agencies are required to remediate each entry by its due date. This page joins the KEV entries for SolarWinds with NVD CVSS scores and CISA's ransomware-campaign flag. See our methodology or browse all CVEs.
Key findings
CISA's Known Exploited Vulnerabilities catalog lists 11 SolarWinds vulnerabilities confirmed as exploited in the wild across 4 products; 2 of them (18%) are flagged as used in known ransomware campaigns. Web Help Desk is the most-affected product, with 5 entries (45% of the total). CISA added 4 entries in 2026 so far, compared with 0 in 2025. Across the 11 entries with an NVD CVSS score (100% of the total), the average score is 8.5; 6 entries are rated critical by NVD. The most recent addition is CVE-2026-28318 (SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability), added on 2026-06-05.
Affected products
| Product | Entries | Share |
|---|---|---|
| Web Help Desk | 5 | 45% |
| Serv-U | 4 | 36% |
| Orion | 1 | 9.1% |
| Virtualization Manager | 1 | 9.1% |
Entries added per year
By date added to the KEV catalog
Exploited SolarWinds vulnerabilities (11)
Newest first. CVSS scores from NVD where available.
| CVE | Product | Vulnerability | Date added | Ransomware | CVSS |
|---|---|---|---|---|---|
| CVE-2026-28318 | Serv-U | SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability | 2026-06-05 | — | HIGH7.5 |
| CVE-2025-26399 | Web Help Desk | SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability | 2026-03-09 | Known | CRITICAL9.8 |
| CVE-2025-40536 | Web Help Desk | SolarWinds Web Help Desk Security Control Bypass Vulnerability | 2026-02-12 | — | HIGH8.1 |
| CVE-2025-40551 | Web Help Desk | SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability | 2026-02-03 | — | CRITICAL9.8 |
| CVE-2024-28987 | Web Help Desk | SolarWinds Web Help Desk Hardcoded Credential Vulnerability | 2024-10-15 | — | CRITICAL9.1 |
| CVE-2024-28986 | Web Help Desk | SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability | 2024-08-15 | — | CRITICAL9.8 |
| CVE-2024-28995 | Serv-U | SolarWinds Serv-U Path Traversal Vulnerability | 2024-07-17 | — | HIGH8.6 |
| CVE-2021-35247 | Serv-U | SolarWinds Serv-U Improper Input Validation Vulnerability | 2022-01-21 | — | MEDIUM4.3 |
| CVE-2020-10148 | Orion | SolarWinds Orion Authentication Bypass Vulnerability | 2021-11-03 | — | CRITICAL9.8 |
| CVE-2021-35211 | Serv-U | SolarWinds Serv-U Remote Code Execution Vulnerability | 2021-11-03 | Known | CRITICAL9.0 |
| CVE-2016-3643 | Virtualization Manager | SolarWinds Virtualization Manager Privilege Escalation Vulnerability | 2021-11-03 | — | HIGH7.8 |
Source: CISA Known Exploited Vulnerabilities catalog, joined with NIST NVD CVSS data. Vendor names are normalized across spellings. Compare all vendors.