Broken Access Control in SolarWinds Serv-U
CVE-2026-28321

4.7MEDIUM

Key Information:

Vendor

Solarwinds
Status
Serv-u
Vendor
CVE Published:
21 July 2026

What is CVE-2026-28321?

SolarWinds Serv-U is susceptible to a broken access control vulnerability that can allow unauthorized users to read and write arbitrary files. This weakness may lead to privilege escalation, enabling an attacker to execute code with root-level permissions. While this vulnerability requires domain administrator access for exploitation, the risk is comparatively lower in Windows environments.

Affected Version(s)

Serv-U Windows 15.5.4 HF1 and below

References

https://www.solarwinds.com/trust-center/security-advisori...
vendor-advisory
https://documentation.solarwinds.com/en/success_center/se...
release-notes

CVSS V3.1

Score:
4.7
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Intigriti Bug Bounty Program
.