Critical severity · published Jul 21, 2026
CVE-2026-28308
SolarWinds Serv-U Insecure Direct Object Reference (IDOR) Vulnerability
9.1
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
Serv-U · SolarWinds
15.5.4 HF1 and below · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28308
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28308
Release Notes
https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_2026-3_release_notes.htm
Vendor Advisory
https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28308
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