All vulnerabilities
CVE-2021-35211

SolarWinds Serv-U Remote Code Execution Vulnerability

SolarWinds Serv-UNetwork & edge
Open in ThreatlineRecord JSON
CVSS
9.0Critical
ExploitationExploited in the wildAdded to KEV 3 Nov 2021. Known ransomware useCISA KEV
Exploit odds (EPSS)91.2%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in15.2.3 HF1Fixed versionCVE List
Federal deadline17 Nov 2021Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

  • 15.2.3 HF1Serv-U Managed File Transfer Server and Serv-U Secured FTPCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 14 Jul 2021, 20:55 UTCPublishedCVE List
  2. 3 Nov 2021Added to CISA KEVCISA KEV

Public exploit code and templates 1

  • Scanner templateSolarWinds Serv-U FTP - Remote Code ExecutionNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

SolarWinds Serv-U contains an unspecified memory escape vulnerability which can allow for remote code execution.

Text from CVE List

Affected versions 1

  • Serv-U Managed File Transfer Server and Serv-U Secured FTPaffected: SolarWinds Serv-U before 15.2.3 HF1CVE List

References 4