VulnerabilityAnalyzed

CVE-2025-40539

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.

HIGH 7.2EPSS 0.45%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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 3.1: 7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.45% probability · 38th percentile
CISA KEV: Not listed
Weakness: CWE-704
Affected: solarwinds/serv-u
Source: psirt@solarwinds.com

References

https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4_release_notes.htmRelease Notes, Vendor Advisory
https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40539Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.