Solarwinds Serv-U vulnerabilities

CVE-2021-35211 [CRITICAL] CWE-787 CVE-2021-35211: Microsoft discovered a remote code execution (RCE) vulnerability in the SolarWinds Serv-U product ut 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 affe

CVE-2024-28995 [HIGH] CWE-22 CVE-2024-28995: SolarWinds Serv-U was susceptible to a directory transversal vulnerability that would allow access t SolarWinds Serv-U was susceptible to a directory transversal vulnerability that would allow access to read sensitive files on the host machine.

CVE-2026-28318 [HIGH] CWE-400 CVE-2026-28318: SolarWinds Serv-U is susceptible to specially crafted POST requests that crash the Serv-U service wi SolarWinds Serv-U is susceptible to specially crafted POST requests that crash the Serv-U service without authentication using Content-Encoding: deflate. Mitigation steps are provided to secure customer environments in the SolarWinds Trust Center if you are unable to deploy the update

CVE-2021-35247 [MEDIUM] CWE-20 CVE-2021-35247: Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sa Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sanitized. SolarWinds has updated the input mechanism to perform additional validation and sanitization. Please Note: No downstream affect has been detected as the LDAP servers ignored improper characters. To insure proper input validation is completed i

CVE-2021-35250 [HIGH] CWE-22 CVE-2021-35250: A researcher reported a Directory Transversal Vulnerability in Serv-U 15.3. This may allow access to A researcher reported a Directory Transversal Vulnerability in Serv-U 15.3. This may allow access to files relating to the Serv-U installation and server files. This issue has been resolved in Serv-U 15.3 Hotfix 1.

CVE-2024-45711 [HIGH] CWE-22 CVE-2024-45711: SolarWinds Serv-U is vulnerable to a directory traversal vulnerability where remote code execution SolarWinds Serv-U is vulnerable to a directory traversal vulnerability where remote code execution is possible depending on privileges given to the authenticated user. This issue requires a user to be authenticated and this is present when software environment variables are abused. Authentication is required for this vulnerability

CVE-2026-28304 [CRITICAL] CWE-284 CVE-2026-28304: SolarWinds Serv-U is affected by a remote code execution vulnerability that, when exploited, can all SolarWinds Serv-U is affected by a remote code execution vulnerability that, when exploited, can allow the arbitrary execution of code remotely as root. The impact is lower in Windows deployments.

CVE-2020-35481 [CRITICAL] CVE-2020-35481: SolarWinds Serv-U before 15.2.2 allows Unauthenticated Macro Injection. SolarWinds Serv-U before 15.2.2 allows Unauthenticated Macro Injection.

CVE-2026-28316 [CRITICAL] CWE-639 CVE-2026-28316: SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can l SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to privilege escalation to a system administrator with the ability to execute commands as the root user. This issue requires a domain account with administrator access. The impact is lower in Windows deployments.

CVE-2026-28305 [CRITICAL] CWE-639 CVE-2026-28305: SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can l SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to remote code execution as root. A domain account with admin privileges and read and write access to the home directory is required. The impact is lower in Windows deployments.

CVE-2026-28302 [CRITICAL] CWE-639 CVE-2026-28302: SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can l SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to privilege escalation and remote code execution as root. This issue requires group administrator access. The impact is lower in Windows deployments.

CVE-2021-35223 [HIGH] CWE-20 CVE-2021-35223: The Serv-U File Server allows for events such as user login failures to be audited by executing a co The Serv-U File Server allows for events such as user login failures to be audited by executing a command. This command can be supplied with parameters that can take the form of user string variables, allowing remote code execution.

CVE-2026-28308 [CRITICAL] CWE-639 CVE-2026-28308: SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can l SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to remote code execution. Domain administrator access is required. The impact is lower in Windows deployments.

CVE-2026-28314 [CRITICAL] CWE-639 CVE-2026-28314: SolarWinds Serv-U is affected by an insecure direct object reference vulnerability that leads to an SolarWinds Serv-U is affected by an insecure direct object reference vulnerability that leads to an account takeover. User authentication is required. The impact is lower in Windows deployments.

CVE-2026-28321 [CRITICAL] CWE-284 CVE-2026-28321: SolarWinds Serv-U is affected by a broken access control vulnerability that could allow arbitrary fi SolarWinds Serv-U is affected by a broken access control vulnerability that could allow arbitrary file read and write, which can then be used to escalate privileges and execute code as root. A domain administrator access is required, and the impact is lower in Windows installations.

CVE-2025-40548 [CRITICAL] CWE-269 CVE-2025-40548: A missing validation process exists in Serv U when abused, could give a malicious actor with access A missing validation process exists in Serv U when abused, could give a malicious actor with access to admin privileges the ability to execute code. This issue requires administrative privileges to abuse. On Windows deployments, the risk is scored as a medium because services frequently run under less-privileged service accounts by default.

CVE-2026-28312 [CRITICAL] CWE-285 CVE-2026-28312: SolarWinds Serv-U is affected by a privilege escalation vulnerability. This would elevate a group’s SolarWinds Serv-U is affected by a privilege escalation vulnerability. This would elevate a group’s access to system administrator and allow code execution as root. The impact is lower in Windows deployments.

CVE-2025-40549 [CRITICAL] CWE-22 CVE-2025-40549: A Path Restriction Bypass vulnerability exists in Serv-U that when abused, could give a malicious ac A Path Restriction Bypass vulnerability exists in Serv-U that when abused, could give a malicious actor with access to admin privileges the ability to execute code on a directory. This issue requires administrative privileges to abuse. On Windows systems, this scored as medium due to differences in how paths and home directories are handled.

CVE-2025-40547 [CRITICAL] CWE-116 CVE-2025-40547: A logic error vulnerability exists in Serv-U which when abused could give a malicious actor with acc A logic error vulnerability exists in Serv-U which when abused could give a malicious actor with access to admin privileges the ability to execute code. This issue requires administrative privileges to abuse. On Windows deployments, the risk is scored as a medium because services frequently run under less-privileged service accounts by default.

CVE-2026-28309 [CRITICAL] CWE-862 CVE-2026-28309: SolarWinds Serv-U is affected by a broken access control vulnerability that allows a domain administ SolarWinds Serv-U is affected by a broken access control vulnerability that allows a domain administrator to create system administrator accounts. The impact is lower in Windows deployments.