Description
SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to SMTP hijacking leading to arbitrary account takeover. The impact is lower in Windows deployments.
Affected products
solarwinds: serv-u
References2
- documentation.solarwinds.com/en/success_center/servu/content/re… Release NotesVendor Advisory
- www.solarwinds.com/trust-center/security-advisories/CVE-2026-28… Vendor Advisory
Metrics
- CVSS 3.1
-
9.1
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 43 · as of 14 November 2026
- CWE
- CWE-639
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.