SolarWinds Serv-U type conversion

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.1$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in SolarWinds Serv-U. This impacts an unknown function. This manipulation causes type conversion. This vulnerability is handled as CVE-2025-40539. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in SolarWinds Serv-U (version now known) and classified as critical. Affected by this vulnerability is some unknown processing. The manipulation with an unknown input leads to a type conversion vulnerability. The CWE definition for the vulnerability is CWE-704. The product does not correctly convert an object, resource, or structure from one type to a different type. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at solarwinds.com. This vulnerability is known as CVE-2025-40539 since 04/16/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation needs additional levels of successful authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/25/2026).

The vulnerability scanner Nessus provides a plugin with the ID 299888 (SolarWinds Serv-U 15.5.4 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (299888) and CERT Bund (WID-SEC-2026-0485). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • SolarWinds Serv-U

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 8.1

VulDB Base Score: 7.2
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.1
CNA Vector (SolarWinds): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Type conversion
CWE: CWE-704
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 299888
Nessus Name: SolarWinds Serv-U 15.5.4 Multiple Vulnerabilities

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/16/2025 CVE reserved
02/24/2026 +314 days Advisory disclosed
02/24/2026 +0 days VulDB entry created
02/25/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: solarwinds.com

Advisory: solarwinds.com
Status: Confirmed

CVE: CVE-2025-40539 (🔒)
GCVE (CVE): GCVE-0-2025-40539
GCVE (VulDB): GCVE-100-347521
CERT Bund: WID-SEC-2026-0485 - SolarWinds Serv-U: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit Administratorrechten

Entryinfo

Created: 02/24/2026 09:26
Updated: 02/25/2026 09:24
Changes: 02/24/2026 09:26 (60), 02/24/2026 12:53 (7), 02/25/2026 09:24 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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