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CVE-2025-40551

SolarWinds Web Help Desk Deserialization of Untrusted Data Remote Code Execution Vulnerability

Published: Jan 28, 2026Updated: Feb 4, 2026 Sources: CVE List NVD BDUCWE-502
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
84.1%
Top 0.3%
CISA KEV
Active Exploitation
Since Feb 3, 2026
Exploits
No Known Exploits
Remediation
Patch Available
Am I actually vulnerable?1 Nuclei template available — see how to check your systems. How to verify

Description

SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine. This could be exploited without authentication.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-502

Affected Products

web help desksolarwinds
On-premWeb App
Enterprise Software / itsm-monitoring
SolarWinds Web Help DeskSolarWinds Inc.
On-prem
Enterprise Software / itsm-monitoring
Web Help DeskSolarWinds
On-premWeb App
Enterprise Software / itsm-monitoring
solarwindscommercialUSEnterprise Softwareaka solar winds
solarwinds inc.commercialUSEnterprise Softwareaka solarwinds orion platform, serv-u file server, access rights manager

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Feb 3, 2026
Remediation due:Feb 6, 2026

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Official Patch Available

MITRE ATT&CK

3 techniques
Execution
Initial Access
View detailed technique mapping

References

https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm
documentation.solarwinds.com
https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40551
solarwinds.com
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-40551
cisa.gov
and 3 more references View all →

Timeline

Published
Jan 28, 2026
Added to CISA KEV
Feb 3, 2026
Last Updated
Feb 4, 2026

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