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CISA Known Exploited Vulnerability
This CVE is actively exploited in the wild. CISA mandates federal agencies to patch immediately.
CVE

CVE-2021-35211

9.0
CVSScritical
Exploitable remotely over the internet · no authentication required.
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.

Attack Vector
Network
Privileges Req.
None
User Interaction
None
serv-u managed file transfer server and serv-u secured ftp
Updated Nov 10, 2026View on NVD →
S4E scanner
highMisconfiguration~10 seconds

SolarWinds Serv-U FTP - Remote Code Execution

SolarWinds Serv-U Managed File Transfer and Serv-U Secure FTP for Windows before 15.2.3 HF2 contain a remote memory escape caused remote code execution vulnerability, letting attackers gain privileged access, exploit requires remote attacker to send crafted memory operations. References: https://github.com/BishopFox/CVE-2021-35211 https://www.rapid7.com/db/vulnerabilities/solarwinds-serv-u-cve-2021-35211/ https://www.microsoft.com/en-us/security/blog/2021/07/13/microsoft-discovers-threat-actor-targeting-solarwinds-serv-u-software-with-0-day-exploit/ Remediation: Update to version 15.2.3 HF2 or later.

10 assets checked · domain, subdomain, ipv4

CVE history: serv-u managed file transfer server and serv-u secured ftp

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