Broken Access Control Vulnerability for SolarWinds Serv-U
Priority LOW 39CWE-284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.
Summary
When a user has admin rights in Serv-U Console, the user can move, create and delete any files are able to be accessed on the Serv-U host machine.
Why it matters now
EPSS 0.01205 68th percentileScored 2026-11-07
Fix Fixed Serv-U FTP (SolarWinds): 15.2.5
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| SolarWinds | Serv-U FTP | 15.2.4 Hotfix 1 and previous versions to before 15.2.5 | 15.2.5 | Patch available | CNA |
- Serv-U FTP VendorSolarWinds Affected 15.2.4 Hotfix 1 and previous versions to before 15.2.5 Fixed in 15.2.5 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:solarwinds:serv-u:*:*:*:*:*:*:*:* | before 15.2.4 | Vulnerable | SolarWinds |
| cpe:2.3:a:solarwinds:serv-u:15.2.4:hotfix1:*:*:*:*:*:* | 15.2.4 hotfix1 | Vulnerable | SolarWinds |
| cpe:2.3:a:solarwinds:serv-u:15.2.5:-:*:*:*:*:*:* | 15.2.5 | Vulnerable | SolarWinds |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:solarwinds:serv-u:*:*:*:*:*:*:*:* Versions before 15.2.4 Vulnerable ·SolarWinds
- cpe:2.3:a:solarwinds:serv-u:15.2.4:hotfix1:*:*:*:*:*:* Versions 15.2.4 hotfix1 Vulnerable ·SolarWinds
- cpe:2.3:a:solarwinds:serv-u:15.2.5:-:*:*:*:*:*:* Versions 15.2.5 Vulnerable ·SolarWinds
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
- Fix · CNA Serv-U FTP (SolarWinds) Fixed in 15.2.5
Timeline
- 2026-10-02 Threatist record created from CVE-2021-35245
- 2026-10-03 Alias added: GHSA-6wqv-7jxp-qpmj
References
More SolarWinds Serv-u vulnerabilities
- TI-2021-14105 Serv-U Remote Memory Escape Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2024-19183 SolarWinds Serv-U L Directory Transversal Vulnerability KEVCVSS 3.1HIGH 8.6
- TI-2026-22619 SolarWinds Serv-U Unauthenticated Denial of Service Vulnerability KEVCVSS 3.1HIGH 7.5
- TI-2021-14139 Improper Input Validation Vulnerability in Serv-U KEVCVSS 3.1MEDIUM 5.3
- TI-2024-30693 SolarWinds Serv-U FTP Service Directory Traversal Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
- TI-2021-14142 Directory Transversal Vulnerability in Serv-U 15.3 CVSS 3.1HIGH 7.5
Sources
- CVE-2021-35245 · CVE Program
- CVE-2021-35245 · NVD
- FIRST EPSS
- GHSA-6wqv-7jxp-qpmj · GitHub Advisory Database · CC BY 4.0
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