CVE-2026-28309

CRITICAL 9.1

SolarWinds Serv-U Broken Access Control Vulnerability

CVSS Score

9.1

EPSS Score

0.3%

EPSS Percentile

27th

SolarWinds Serv-U is affected by a broken access control vulnerability that allows a domain administrator to create system administrator accounts. The impact is lower in Windows deployments.

CWE	CWE-862
Vendor	solarwinds
Product	serv-u
Published	Jul 21, 2026
Last Updated	Jul 22, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

SolarWinds / Serv-U

15.5.4 HF1 and below

References

NVD ↗ CVE.org ↗ EPSS Data ↗

https: https://https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28309 documentation.solarwinds.com: https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_2026-3_release_notes.htm

Credits

Intigriti Bug Bounty Program