CVE-2026-28313
Received Received - Intake

SMTP Hijacking via IDOR in SolarWinds Serv-U

Publication date: 2026-07-21

Last updated on: 2026-07-21

Assigner: SolarWinds

Description
SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to SMTP hijacking leading to arbitrary account takeover. The impact is lower in Windows deployments.

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Meta Information

Published
2026-07-21
Last Modified
2026-07-21
Generated
2026-07-21
AI Q&A
2026-07-21
EPSS Evaluated
N/A
NVD
CVE-2026-28313
EUVD
EUVD-2026-46293

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
solarwinds serv-u *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

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Executive Summary

SolarWinds Serv-U has an insecure direct object reference (IDOR) vulnerability that allows attackers to bypass authorization and manipulate SMTP settings. This can lead to account takeovers by hijacking email-based authentication processes.

Impact Analysis

An attacker could exploit this to take over user accounts, gain unauthorized access to systems, or intercept sensitive communications. The impact is reduced in Windows environments but still significant.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR and HIPAA requirements for data protection and access controls. Organizations may face compliance penalties if exploited.

Mitigation Strategies

Update SolarWinds Serv-U to the latest patched version immediately to address the IDOR vulnerability and prevent SMTP hijacking and account takeover risks.

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