What is CVE-2025-40540?

CVE-2025-40540 is a critical-severity vulnerability in Solarwinds Serv-u, classified under Incorrect Type Conversion or Cast. CVSS score: 9.1/10. Published 2026-02-24.

How severe is CVE-2025-40540?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Solarwinds Serv-u

CVE-2025-40540

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 deploymen…

EPSS: 0.001 (25.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Solarwinds Serv-u — versions SolarWinds Serv-U 15.5.3 and prior versions

Weakness classification (CWE)

CWE-704 — Incorrect Type Conversion or Cast

References

www.solarwinds.com/trust-center/security-advisories/CVE-2025-40540
documentation.solarwinds.com/en/success_center/servu/content/release_notes/serv…

Frequently asked questions

What is CVE-2025-40540?: CVE-2025-40540 is a critical-severity vulnerability in Solarwinds Serv-u, classified under Incorrect Type Conversion or Cast. CVSS score: 9.1/10. Published 2026-02-24.
How severe is CVE-2025-40540?: Critical severity. CVSS v3 base score is 9.1 out of 10.