CVE-2026-28307
Received Received - Intake

Privilege Escalation in SolarWinds Serv-U

Publication date: 2026-07-21

Last updated on: 2026-07-21

Assigner: SolarWinds

Description
SolarWinds Serv-U is affected by a privilege escalation vulnerability that allows a domain user group to be elevated into an administrator group. The impact is lower in Windows deployments.

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-28307
EUVD
EUVD-2026-46288

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
solarwinds serv-u *
solarwinds serv-u to 2026.3 (exc)
solarwinds serv-u 2026.3

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

CVE-2026-28307 is a privilege escalation vulnerability in SolarWinds Serv-U software. It allows a domain user group to be elevated to an administrator group, granting higher privileges than intended. The vulnerability affects Serv-U versions 15.5.4 HF1 and below.

Detection Guidance

To detect this vulnerability, check the installed version of SolarWinds Serv-U. If it is 15.5.4 HF1 or below, the system is vulnerable. Compare the version against the patched version 2026.3. Use commands like 'servu-version' or check the installed program list in Windows.

Impact Analysis

An attacker could exploit this to gain administrative access, potentially compromising the entire system. The impact is lower in Windows deployments. The vulnerability has a CVSS score of 9.1, indicating critical severity.

Compliance Impact

The vulnerability allows unauthorized privilege escalation, which could lead to unauthorized access to sensitive data. This may violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data security) by enabling unauthorized users to access or modify protected information.

Mitigation Strategies

Upgrade SolarWinds Serv-U to version 2026.3 or later to address the vulnerability. If using an affected version, restrict domain user group access and monitor for unauthorized privilege escalation attempts.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-28307. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart