SolarWinds Serv U

SolarWinds Serv-U Broken Access Control (BAC) Enables Arbitrary File RW & Priv Esc
CVE-2026-28321 9.1 - Critical - July 21, 2026

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.

Authorization

SolarWinds Serv-U IDOR Privilege Escalation Vulnerability
CVE-2026-28317 9.1 - Critical - July 21, 2026

SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to privilege escalation. This issue requires domain administrator access. The impact is lower in Windows deployments.

Insecure Direct Object Reference / IDOR

SolarWinds Serv-U IDOR Priv Escalation via Insecure Direct Object Ref
CVE-2026-28316 9.1 - Critical - July 21, 2026

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.

Insecure Direct Object Reference / IDOR

SolarWinds Serv-U Stored XSS: Session Hijack/Info Discl
CVE-2026-28315 6.2 - Medium - July 21, 2026

SolarWinds Serv-U was found to be affected by a stored cross-site scripting vulnerability that could lead to session hijacking or information disclosure from an administrator account.

XSS

SolarWinds ServU IDOR Account Takeover
CVE-2026-28314 9.1 - Critical - July 21, 2026

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.

Insecure Direct Object Reference / IDOR

SolarWinds ServU IDOR Enables SMTP Hijacking & Account Takeover
CVE-2026-28313 9.1 - Critical - July 21, 2026

SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to SMTP hijacking leading to arbitrary account takeover. The impact is lower in Windows deployments.

Insecure Direct Object Reference / IDOR

SolarWinds Serv-U Privilege Escalation Elevating Group to sysadmin
CVE-2026-28312 9.1 - Critical - July 21, 2026

SolarWinds Serv-U is affected by a privilege escalation vulnerability. This would elevate a groups access to system administrator and allow code execution as root. The impact is lower in Windows deployments.

AuthZ

SolarWinds Serv-U PrivEsc: Domain Admin to Sys Admin
CVE-2026-28310 9.1 - Critical - July 21, 2026

SolarWinds Serv-U is affected by a privilege escalation vulnerability that allows a domain administrator to escalate their user type to that of a system administrator. The impact is lower in Windows deployments.

AuthZ

SolarWinds Serv-U ACL flaw: domain admin can add sys admin
CVE-2026-28309 9.1 - Critical - July 21, 2026

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.

AuthZ

SolarWinds Serv-U IDOR Enables Remote Code Exec
CVE-2026-28308 9.1 - Critical - July 21, 2026

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.

Insecure Direct Object Reference / IDOR

SolarWinds Serv-U PrivEsc: Domain User -> Admin
CVE-2026-28307 9.1 - Critical - July 21, 2026

SolarWinds Serv-U is affected by a privilege escalation vulnerability that allows a domain user group to be elevated into an administrator group. The impact is lower in Windows deployments.

Authorization

SolarWinds Serv-U Priv Esc Vulnerability CVE-2026-28306
CVE-2026-28306 9.1 - Critical - July 21, 2026

SolarWinds Serv-U is affected by a privilege escalation vulnerability that allows a domain administrator to elevate their privileges to a system administrator. The impact is lower in Windows deployments.

Authorization

SolarWinds Serv-U IDOR Enables Root RCE via Insecure Direct Object Reference
CVE-2026-28305 9.1 - Critical - July 21, 2026

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.

Insecure Direct Object Reference / IDOR

SolarWinds Serv-U RCE; remote code exec as root (Windows impact lower)
CVE-2026-28304 9.1 - Critical - July 21, 2026

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.

Authorization

Serv-U IDOR Enables Priv Escalation & RCE as Root
CVE-2026-28302 9.1 - Critical - July 21, 2026

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.

Insecure Direct Object Reference / IDOR

SolarWinds Serv-U DoS via malformed Content-Encoding: deflate POST
CVE-2026-28318 7.5 - High - June 04, 2026

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

Resource Exhaustion

Serv-U IDOR Enables Privileged Native Code Execution
CVE-2025-40541 9.1 - Critical - February 24, 2026

An Insecure Direct Object Reference (IDOR) vulnerability exists in Serv-U, which when exploited, gives a malicious actor the ability to execute native code as a privileged account. 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.

Incorrect Type Conversion or Cast

Serv-U Type Confusion Enables Privileged Native Code Exec
CVE-2025-40540 9.1 - Critical - February 24, 2026

A type confusion vulnerability exists in Serv-U which when exploited, gives a malicious actor the ability to execute arbitrary native code as privileged account. 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.

Incorrect Type Conversion or Cast

Serv-U Type Confusion Enables Privileged Native Code Execution
CVE-2025-40539 9.1 - Critical - February 24, 2026

A type confusion vulnerability exists in Serv-U which when exploited, gives a malicious actor the ability to execute arbitrary native code as privileged account. 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.

Incorrect Type Conversion or Cast

Serv-U ACL Bypass Privilege Escalation to System Admin
CVE-2025-40538 9.1 - Critical - February 24, 2026

A broken access control vulnerability exists in Serv-U which when exploited, gives a malicious actor the ability to create a system admin user and execute arbitrary code as a privileged account via domain admin or group admin privileges. 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.

Improper Privilege Management

Serv-U Path Restriction Bypass Allows Admin Code Exec on Windows
CVE-2025-40549 9.1 - Critical - November 18, 2025

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.

Directory traversal

Admin-Privilege Code Execution via Serv-U (SolarWinds)
CVE-2025-40548 9.1 - Critical - November 18, 2025

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.

Improper Privilege Management

ServU Logic Error Enables Admin Code Exec
CVE-2025-40547 9.1 - Critical - November 18, 2025

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.

Output Sanitization

SolarWinds ServU dir traversal RCE (CVE202445711)
CVE-2024-45711 8.8 - High - October 16, 2024

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

Directory traversal

Auth XSS via Variable Modification in unknown web app
CVE-2024-45714 4.1 - Medium - October 16, 2024

Application is vulnerable to Cross Site Scripting (XSS) an authenticated attacker with users permissions can modify a variable with a payload.

XSS

SolarWinds Serv-U Dir Trav Exposes Sensitive Files
CVE-2024-28995 8.6 - High - June 06, 2024

SolarWinds Serv-U was susceptible to a directory transversal vulnerability that would allow access to read sensitive files on the host machine.

Directory traversal

Arbitrary File Overwrite via Unsanitized Log Path Tags (CVE202428072)
CVE-2024-28072 4.9 - Medium - May 03, 2024

A highly privileged account can overwrite arbitrary files on the system with log output. The log file path tags were not sanitized properly.

Insertion of Sensitive Information into Log File

SolarWinds Serv-U Directory Traversal RCE Requires Admin Privileges
CVE-2024-28073 7.2 - High - April 17, 2024

SolarWinds Serv-U was found to be susceptible to a Directory Traversal Remote Code Vulnerability. This vulnerability requires a highly privileged account to be exploited.

Directory traversal

Auth Access in SolarWinds Serv-U 15.4 File Share (CVE-2023-40053)
CVE-2023-40053 5 - Medium - December 06, 2023

A vulnerability has been identified within Serv-U 15.4 that allows an authenticated actor to insert content on the file share function feature of Serv-U, which could be used maliciously.

Serv-U 15.4 Hotfix 1 Auth Bypass Admin MFA Failure
CVE-2023-40060 7.2 - High - September 07, 2023

A vulnerability has been identified within Serv-U 15.4 and 15.4 Hotfix 1 that, if exploited, allows an actor to bypass multi-factor/two-factor authentication. The actor must have administrator-level access to Serv-U to perform this action. 15.4.  SolarWinds found that the issue was not completely fixed in 15.4 Hotfix 1. 

Authorization

Serv-U 15.4 MFA Bypass via Admin Privileges
CVE-2023-35179 7.2 - High - August 11, 2023

A vulnerability has been identified within Serv-U 15.4 that, if exploited, allows an actor to bypass multi-factor/two-factor authentication. The actor must have administrator-level access to Serv-U to perform this action. 

Authorization

SolarWinds Serv-U URL Disclosure on File Share Update
CVE-2023-23841 7.5 - High - June 15, 2023

SolarWinds Serv-U is submitting an HTTP request when changing or updating the attributes for File Share or File request.? Part of the URL of the request discloses sensitive data. 

Cleartext Transmission of Sensitive Information

Serv-U 15.3.0-15.3.1 Directory Creation Vulnerability (CVE-2022-38106)
CVE-2022-38106 5.4 - Medium - December 16, 2022

This vulnerability happens in the web client versions 15.3.0 to Serv-U 15.3.1. This vulnerability affects the directory creation function.

XSS

Serv-U FTP Server: Encryption Key Reuse Enables Plaintext Recovery
CVE-2021-35252 7.5 - High - December 16, 2022

Common encryption key appears to be used across all deployed instances of Serv-U FTP Server. Because of this an encrypted value that is exposed to an attacker can be simply recovered to plaintext.

authentification

This broken access control vulnerability pertains specifically to a domain admin who can access configuration & user data of other domains
CVE-2021-35249 4.3 - Medium - May 17, 2022

This broken access control vulnerability pertains specifically to a domain admin who can access configuration & user data of other domains which they should not have access to. Please note the admin is unable to modify the data (read only operation). This UAC issue leads to a data leak to unauthorized users for a domain, with no log of them accessing the data unless they attempt to modify it. This read-only activity is logged to the original domain and does not specify which domain was accessed.

A researcher reported a Directory Transversal Vulnerability in Serv-U 15.3
CVE-2021-35250 7.5 - High - April 25, 2022

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.

Directory traversal

Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sanitized
CVE-2021-35247 4.3 - Medium - January 10, 2022

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 in all environments. SolarWinds recommends scheduling an update to the latest version of Serv-U.

Improper Input Validation

Serv-U server responds with valid CSRFToken when the request contains only Session.
CVE-2021-35242 8.8 - High - December 06, 2021

Serv-U server responds with valid CSRFToken when the request contains only Session.

Session Riding

The Serv-U File Server allows for events such as user login failures to be audited by executing a command
CVE-2021-35223 8.8 - High - August 31, 2021

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.

Microsoft discovered a remote code execution (RCE) vulnerability in the SolarWinds Serv-U product utilizing a Remote Memory Escape Vulnerability
CVE-2021-35211 9 - Critical - July 14, 2021

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.

Memory Corruption

Share/IncomingWizard.htm in SolarWinds Serv-U before 15.2.3 mishandles the user-supplied SenderEmail parameter, aka "Share URL XSS
CVE-2021-32604 5.4 - Medium - May 11, 2021

Share/IncomingWizard.htm in SolarWinds Serv-U before 15.2.3 mishandles the user-supplied SenderEmail parameter, aka "Share URL XSS."

XSS

An issue was discovered in SolarWinds Serv-U before 15.2.2
CVE-2021-3154 7.5 - High - May 04, 2021

An issue was discovered in SolarWinds Serv-U before 15.2.2. Unauthenticated attackers can retrieve cleartext passwords via macro Injection. NOTE: this had a distinct fix relative to CVE-2020-35481.

Injection

In SolarWinds Serv-U before 15.2.2 Hotfix 1, there is a directory containing user profile files (
CVE-2021-25276 7.1 - High - February 03, 2021

In SolarWinds Serv-U before 15.2.2 Hotfix 1, there is a directory containing user profile files (that include users' password hashes) that is world readable and writable. An unprivileged Windows user (having access to the server's filesystem) can add an FTP user by copying a valid profile file to this directory. For example, if this profile sets up a user with a C:\ home directory, then the attacker obtains access to read or replace arbitrary files with LocalSystem privileges.

Incorrect Permission Assignment for Critical Resource

SolarWinds Serv-U before 15.2.2
CVE-2020-35482 5.4 - Medium - February 03, 2021

SolarWinds Serv-U before 15.2.2 allows authenticated reflected XSS.

XSS

SolarWinds Serv-U before 15.2.2
CVE-2020-35481 9.8 - Critical - February 03, 2021

SolarWinds Serv-U before 15.2.2 allows Unauthenticated Macro Injection.

SolarWinds Serv-U before 15.2.2
CVE-2020-28001 5.4 - Medium - February 03, 2021

SolarWinds Serv-U before 15.2.2 allows Authenticated Stored XSS.

XSS

SolarWinds Serv-U before 15.2.2
CVE-2020-27994 6.5 - Medium - February 03, 2021

SolarWinds Serv-U before 15.2.2 allows Authenticated Directory Traversal.

Directory traversal

SolarWinds Serv-U File Server before 15.2.1
CVE-2020-15576 7.5 - High - July 07, 2020

SolarWinds Serv-U File Server before 15.2.1 allows information disclosure via an HTTP response.

Information Disclosure

SolarWinds Serv-U File Server before 15.2.1
CVE-2020-15575 6.1 - Medium - July 07, 2020

SolarWinds Serv-U File Server before 15.2.1 allows XSS as demonstrated by Tenable Scan, aka Case Number 00484194.

XSS

SolarWinds Serv-U File Server before 15.2.1 mishandles the Same-Site cookie attribute
CVE-2020-15574 7.5 - High - July 07, 2020

SolarWinds Serv-U File Server before 15.2.1 mishandles the Same-Site cookie attribute, aka Case Number 00331893.

Missing Encryption of Sensitive Data