CVE-2026-28321CWE-284

SolarWinds Serv-U Broken Access Control Vulnerability

Critical · published July 21, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
46.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00577 · 46.8th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-07-21T15:39Z
EPSS history
Timeline
  • 21 JUL 15:39Z
    SolarWinds Serv-U Broken Access Control Vulnerability
    cvelistv5