CVE-2021-35250: high-severity vulnerability in SolarWinds Serv-U
Directory Transversal Vulnerability in Serv-U 15.3
Published · Updated
83Vexday Risk Score
Patch now. It exploitation observed by VulnCheck and has a working public exploit.
ssvc Actcvss 7.5epss 13%
from disclosure to weapon353 days
Published on NVDApr 25
1st PoC+353d
VulnCheck+608d
exploitation probability
13%top 4% of all CVEs
observed exploitation
yesVulnCheck
1 public exploit(s)
A researcher reported a Directory Transversal Vulnerability in Serv-U 15.3. This may allow access to files relating to the Serv-U installation and server files. This issue has been resolved in Serv-U 15.3 Hotfix 1.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
SolarWinds · Serv-Upublic PoCs found — 1
vulncheckvulncheck.com/xdb/ef3ce8b5d2d5unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — SolarWinds Serv-U
In the same product, most dangerous first.
CVE-2021-35247MEDIUMImproper Input Validation Vulnerability in Serv-UEPSS 3.5%KEVCVE-2026-28318HIGHSolarWinds Serv-U Unauthenticated Denial of Service VulnerabilityEPSS 1.9%KEVCVE-2024-45711HIGHSolarWinds Serv-U FTP Service Directory Traversal Remote Code Execution VulnerabilityEPSS 6.3%CVE-2021-35223HIGHExecute Command Function Allows Remote Code Execution (RCE)VulnerabilityEPSS 2.9%CVE-2026-28316CRITICALSolarWinds Serv-U Insecure Direct Object Reference (IDOR) VulnerabilityEPSS 2.1%CVE-2025-40549CRITICALSolarWinds Serv-U Path Restriction Bypass VulnerabilityEPSS 1.1%