CVE-2026-28321 | SolarWinds Serv-U is affected by a broken access control vul… | CVSS 9.1 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2026-28321
State: PUBLISHED
Assigner: SolarWinds
Reserved: 2026-02-26 14:46 UTC
Published: 2026-07-21 15:39 UTC
Last updated: 2026-07-21 17:29 UTC
Primary CWE: CWE-284
CWE-284 Improper Access Control
Vendor / Product: SolarWinds / Serv-U
Sources: cve.org · NVD

Severity & Metrics

9.1 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
SolarWinds	Serv-U	Windows,Linux	15.5.4 HF1 and below

Weakness (CWE)

CWE	Source	Description
CWE-284	cna	CWE-284 Improper Access Control

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.1	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
4.7	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

References (2)