CVE-2026-28313 | SolarWinds Serv-U is affected by an insecure direct object r… | CVSS 9.1 CRITICAL

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.

Metadata

CVE ID: CVE-2026-28313
State: PUBLISHED
Assigner: SolarWinds
Reserved: 2026-02-26 14:28 UTC
Published: 2026-07-21 15:38 UTC
Last updated: 2026-07-21 15:38 UTC
Primary CWE: CWE-639
CWE-639 Authorization Bypass Through User-Controlled Key
Vendor / Product: SolarWinds / Serv-U
Sources: cve.org · NVD

Severity & Metrics

9.1 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products (1)

Vendor	Product	Platform	Versions
SolarWinds	Serv-U	Windows,Linux	15.5.4 HF1 and below

Weakness (CWE)

CWE	Source	Description
CWE-639	cna	CWE-639 Authorization Bypass Through User-Controlled Key

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.1	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
4.7	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

References (2)