Vulnerability Intelligence Report
SolarWinds Serv-U Broken Access Control Vulnerability
CVE-2026-28321
SolarWinds Serv-U is affected by a broken access control vulnerability that could allow arbitrary file read and write, which can then be used to escalate privileges and execute code as root. A domain administrator access is required, and the impact is lower in Windows installations.
No Active Exploit Signals
CVSS Base Score
9.1
CRITICAL
Exploitability:2.3
Impact Score:6.1
EPSS Probability:0.40%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-284 ↗CWE-284 Improper Access Control
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| SolarWinds | Serv-U | 15.5.4 HF1 and below (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.401%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | SolarWinds · Vendor · USA |
| Reserved | 2026-02-26T14:46:41 |
| Published | 2026-07-21T15:39:46 |
| Last Updated | 2026-07-24T03:55:48 |
Community Chatter & Buzz