Vulnerability record · CVE-2021-27258 · published 14 April 2021

CVE-2021-27258: Solarwinds orion platform improper access control vulnerability

Solarwinds · Orion Platform

This vulnerability allows remote attackers to execute escalate privileges on affected installations of SolarWinds Orion Platform 2020.2. Authentication is not required to exploit this vulnerability. The specific flaw exists within the SaveUserSetting endpoint. The issue results from improper restriction of this endpoint to unprivileged users. An attacker can leverage this vulnerability to escalate privileges their privileges from Guest to Administrator. Was ZDI-CAN-11903.

9.8 CVSS 3.1 Critical EPSS 4.0% · top 9.9% CWE-284 · Improper access control

9.8CVSS 3.1 base score, v2 7.5

4.0%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

2References

17 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Orion Platform Solarwinds

References

Link	Tags
https://www.zerodayinitiative.com/advisories/ZDI-21-192/	Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-192/	Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-10148SolarWinds Orion API authentication bypass allows remote command executionThe SolarWinds Orion Platform API contains an authentication bypass (CWE-288/CWE-306) that lets a remote, unauthenticated attacker execute API comman…KEVEPSS 92%analysed29 Dec 2020 9.8CVE-2021-25274Solarwinds orion platform deserialization of untrusted data vulnerabilityThe Collector Service in SolarWinds Orion Platform before 2020.2.4 uses MSMQ (Microsoft Message Queue) and doesn't set permissions on its private que…EPSS 36%3 Feb 2021 9.8CVE-2019-9546Solarwinds orion platform uncontrolled search path element vulnerabilitySolarWinds Orion Platform before 2018.4 Hotfix 2 allows privilege escalation through the RabbitMQ service.EPSS 2.8%1 Mar 2019 9.6CVE-2021-35222Solarwinds orion platform cross-site scripting vulnerabilityThis vulnerability allows attackers to impersonate users and perform arbitrary actions leading to a Remote Code Execution (RCE) from the Alerts Setti…EPSS 2.6%31 Aug 2021 9.0CVE-2020-13169Solarwinds orion platform cross-site scripting vulnerabilityStored XSS (Cross-Site Scripting) exists in the SolarWinds Orion Platform before before 2020.2.1 on multiple forms and pages. This vulnerability may …EPSS 2.2%17 Sep 2020 8.8CVE-2022-36960Solarwinds orion platform improper input validation vulnerabilitySolarWinds Platform was susceptible to Improper Input Validation. This vulnerability allows a remote adversary with valid access to SolarWinds Web Co…EPSS 0.91%29 Nov 2022 8.8CVE-2022-36964Solarwinds orion platform deserialization of untrusted data vulnerabilitySolarWinds Platform was susceptible to the Deserialization of Untrusted Data. This vulnerability allows a remote adversary with valid access to Solar…EPSS 17%29 Nov 2022 8.8CVE-2022-36958SolarWinds Platform Web Console deserialization allows remote command executionSolarWinds Platform (Orion Platform) deserializes untrusted data, letting an attacker run arbitrary commands. The flaw is reachable remotely through …EPSS 82%analysed20 Oct 2022

Source: NIST National Vulnerability Database (record CVE-2021-27258), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.