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CVE-2025-40549

SolarWinds Serv-u path traversal

9.1 CRITICALEPSS 1.07%
  1. Published18 Nov 2025

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

SolarWinds Serv-u< 15.5.3

Remediation

Fixed in
SolarWinds Serv-u≥ 15.5.3

References

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Frequently asked

Is CVE-2025-40549 being actively exploited?

CVE-2025-40549 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.07%.

How severe is CVE-2025-40549?

CVE-2025-40549 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 1.07% probability of exploitation.

Which products are affected by CVE-2025-40549?

Affected products include SolarWinds Serv-u.

How do I fix CVE-2025-40549?

Upgrade affected software to a fixed version, for example SolarWinds Serv-u 15.5.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-40549 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.