Skip to content
OpenAdvisories
Critical · 9.0 Known exploited · Ransomware Scanner template Public exploit CVE-2021-35211 EUVD-2021-21854GHSA-cpmg-9xq8-3934

Serv-U Remote Memory Escape Vulnerability

Published Jul 14, 2021 · Updated Oct 21, 2025 · Assigned by SolarWinds

Vendor: SolarWinds Product: Serv-U Managed File Transfer Server and Serv-U Secured FTP

Description

Microsoft discovered a remote code execution (RCE) vulnerability in the SolarWinds Serv-U product utilizing a Remote Memory Escape Vulnerability. If exploited, a threat actor may be able to gain privileged access to the machine hosting Serv-U Only. SolarWinds Serv-U Managed File Transfer and Serv-U Secure FTP for Windows before 15.2.3 HF2 are affected by this vulnerability.

Affected products

VendorProductAffectedFixed
SolarWinds Serv-U Managed File Transfer Server and Serv-U Secured FTP SolarWinds Serv-U – < 15.2.3 HF1 15.2.3 HF1

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 3 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

References