PT-2026-21671 · Serv-U · Serv-U

Published 2026-02-24 · Updated 2026-03-10 · CVE-2025-40541

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Serv-U versions 15.5.3 and earlier

Description An Insecure Direct Object Reference (IDOR) vulnerability exists in Serv-U. Exploitation of this issue allows a malicious actor to execute native code as a privileged account. This requires administrative privileges to abuse. On Windows deployments, the risk is considered medium because services often run under less-privileged service accounts. The vulnerability allows an attacker to access or manipulate objects directly by manipulating parameters or identifiers without proper authorization checks.

Recommendations Serv-U versions 15.5.3 and earlier should be updated to version 15.5.4 or later.

Fix

RCE

IDOR

Incorrect Type Conversion or Cast

Weakness Enumeration

CWE-639

CWE-704

Related Identifiers

CVE-2025-40541

Affected Products

Serv-U

References · 22

• https://osv.dev/vulnerability/CVE-2025-40541 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-40541 · Security Note
• https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4_release_notes.htm · Vendor Advisory
• https://solarwinds.com/trust-center/security-advisories/CVE-2025-40541 · Vendor Advisory
• https://twitter.com/ThreatSynop/status/2026636771992150148 · Twitter Post
• https://twitter.com/SecAlertsCo/status/2026489674374722044 · Twitter Post
• https://twitter.com/CVEnew/status/2026265018136752630 · Twitter Post
• https://reddit.com/r/Action1/comments/1rq3lpr/patch_tuesday_march_2026 · Reddit Post
• https://twitter.com/cracbot/status/2027700476888945135 · Twitter Post
• https://twitter.com/cracbot/status/2028062787885527457 · Twitter Post
• https://twitter.com/CCBalert/status/2026684982597497071 · Twitter Post
• https://twitter.com/ThreatSynop/status/2026695723157238116 · Twitter Post
• https://twitter.com/AIengineerlife/status/2026675751706374172 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2026243450463490244 · Twitter Post
• https://twitter.com/wazuh/status/2028787616091373700 · Twitter Post