Vulnerability · Published Jul 21, 2026 · Assigned by SolarWinds
CVE-2026-28316SolarWinds Serv-U Insecure Direct Object Reference (IDOR) Vulnerability
Critical 9.1
In plain English
A critical-severity authorization bypass via user-controlled key in Serv-U from SolarWinds. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.1% (higher than 82% of all known vulnerabilities).
Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)2.1%top 17.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to privilege escalation to a system administrator with the ability to execute commands as the root user. This issue requires a domain account with administrator access. The impact is lower in Windows deployments.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SolarWinds | Serv-U | 15.5.4 HF1 and below |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H