Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-35211

CVE-2021-35211CRITICAL

SolarWinds Serv-U Managed File Transfer Server and Serv-U Secured FTP — Serv-U Remote Memory Escape Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   N  C  H  H  H    9.0   .9116   99.8   YES

AFFECTED
  Product                                                     Versions             Fixed
  Serv-U Managed File Transfer Server and Serv-U Secured FTP  SolarWinds Serv-U –  —

TIMELINE
  Jun 22  Reserved by SolarWinds
  Jul 14  Published (CNA: SolarWinds)
  Nov 3   Added to CISA KEV, remediation due 2021-11-17

CWE-787 · CNA: SolarWinds · CVSS v3.1 · 3 references · KEV due November 17, 2021

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 22, 2021	Reserved	Reserved by SolarWinds
July 14, 2021	Published	Published (CNA: SolarWinds)
November 3, 2021	KEV ADDED	Added to CISA KEV, remediation due 2021-11-17

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
SolarWinds	Serv-U Managed File Transfer Server and Serv-U Secured FTP	—	SolarWinds Serv-U	—

Weaknesses

CWE-787

References (3)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35211 [government-resource]
https://www.microsoft.com/security/blog/2021/07/13/microsoft-discovers-threat-actor-targeting-solarwinds-serv-u-software-with-0-day-exploit [x_refsource_MISC]
https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35211 [x_refsource_MISC]

Authoritative record: CVE-2021-35211 at cve.org

Vendors: solarwinds

Weaknesses: CWE-787

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-35211 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.