CVE-2026-28308: SolarWinds Serv-U Insecure Direct Object Reference (IDOR) Vulnerability

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-21 · updated 2026-10-24
Weakness: CWE-639

Description

SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to remote code execution. Domain administrator access is required. The impact is lower in Windows deployments.

Affected products

SolarWinds Serv-U: before 2026.3 — fixed in 2026.3

How to fix

Upgrade to a fixed version: SolarWinds Serv-U 2026.3. Check the vendor advisory for mitigations.

References

https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_2026-3_release_notes.htm
https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28308

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