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CVE-2026-28307: CWE-284 Improper Access Control in SolarWinds Serv-U

0
Critical
VulnerabilityCVE-2026-28307cvecve-2026-28307cwe-284
Published: 07/21/2026 (07/21/2026, 15:34:26 UTC)
Source: CVE Database V5
Vendor/Project: SolarWinds
Product: Serv-U

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 v3.1

Score 9.1critical

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 07/21/2026, 16:14:00 UTC

Technical Analysis

SolarWinds Serv-U suffers from a privilege escalation vulnerability categorized under CWE-284 (Improper Access Control). This flaw enables a domain user group to gain administrator group privileges, potentially allowing unauthorized administrative actions. The vulnerability has a high CVSS score of 9.1, indicating critical severity with network attack vector, low attack complexity, and no user interaction required. The impact includes high confidentiality, integrity, and availability consequences. The vendor has not yet provided an official fix or remediation guidance, and no known exploits are reported in the wild. The vulnerability affects Serv-U but no specific affected versions have been identified.

Potential Impact

Successful exploitation allows elevation of privileges from a domain user group to an administrator group, potentially compromising system confidentiality, integrity, and availability. The impact severity is critical, though it is noted to be less severe on Windows deployments. This could lead to unauthorized administrative control over the affected Serv-U system.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, closely monitor vendor communications for updates. No specific mitigations or workarounds have been provided by the vendor at this time.

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Technical Details

Data Version
5.2
Assigner Short Name
SolarWinds
Date Reserved
2026-02-26T14:28:17.157Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a5f96f02a4a8d59895fb23f

Added to database: 07/21/2026, 15:57:36 UTC

Last enriched: 07/21/2026, 16:14:00 UTC

Last updated: 07/21/2026, 21:03:14 UTC

Views: 5

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