CVE-2026-28321

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.

SeverityCritical

CVSS9.1

Exploit probability—

Product

Solarwinds Serv-u

PublishedJul 21, 2026

First seenJul 21, 2026

Weakness typeCWE-284Improper access control

How to fix

Update

solarwinds serv-u2026.3 or later

Vendor advisories

solarwinds.com/trust-center/security-advisories/CVE-2026-28321
documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_2026-3_release_notes.htm

Affected products

Product	Affected versions	Fixed in
solarwinds serv-u	v < 2026.3	2026.3

Check your version

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