CVE-2021-35211

Serv-U Remote Memory Escape Vulnerability

Published Jul 14, 2021 CVSS 3.1 · 9 Critical EPSS 91.2% KEV · Listed
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.

Remediation

Vendor Solution

SolarWinds has released a hotfix 15.2.3 HF2 It is suggested to upgrade to the latest hotfix as soon as possible


Vendor Workaround

SolarWinds advises to disconnect Serv-U Server from internet until patched.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2021-11-03'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
SolarWinds
Published
Updated
Oct 21, 2025, 11:25 PM
Reserved
Jun 22, 2021, 12:00 AM
Status
Analyzed
Published
Jul 14, 2021, 9:15 PM
Modified
Jun 17, 2026, 3:57 AM