SolarWinds Serv-U Type Confusion Remote Code Execution Vulnerability
Published Feb 24, 2026
9.1
CRITICALCVSS 3.1
EPSS 0.45%
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.
Affected products
-
- Version SolarWinds Serv-U 15.5.3 and prior versionsStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| SolarWinds | Serv-U | affected |
|
- < 15.5.4
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
SolarWinds recommends that customers upgrade to SolarWinds Serv-U 15.5.4 as soon as it becomes available.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
1 other source (CVE.org) ▾
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Feb 25, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
Feb–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.45% (0.00453) | 37.07th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.45% (0.00445) | 35.18th | v5 (v2026.06.15) |
| Feb 24, 2026 | 0.04% (0.00043) | 13.15th | v4 (v2025.03.14) |
References (2)
- https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4_release_notes.htm Release NotesVendor Advisory
- https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40539 Vendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4_release_notes.htm | Release NotesVendor Advisory | |
| https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40539 | Vendor Advisory |
Change history (0)
No recorded changes yet.