High severity · published Feb 24, 2026
CVE-2025-40540
SolarWinds Serv-U Type Confusion Remote Code Execution Vulnerability
7.2
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
Serv-U · SolarWinds
SolarWinds Serv-U 15.5.3 and prior versions · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-40540
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-40540
Release Notes
https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4_release_notes.htm
Vendor Advisory
https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40540
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CVE-2024-28995
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5.3
CVE-2021-35247
Improper Input Validation Vulnerability in Serv-U
9.8
CVE-2020-35481
SolarWinds Serv-U before 15.2.2 allows Unauthenticated Macro Injection
