CVE-2026-3563Network attack vector

Denial of service via conflicting URL routes

Published Mar 17, 2026 · Updated Mar 17, 2026

Improper URL validation in Devolutions PowerShell Universal before 2026.1.4 allows remote authenticated users to override server routes. App and Endpoint configuration accepts a user-defined path that conflicts with an existing application or system route instead of rejecting the duplicate. Access requires permission to create or modify Apps or Endpoints; a conflicting path causes unintended request routing and service interruption.

CVSS severity5.5
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper URL validation in Devolutions PowerShell Universal before 2026.1.4 allows remote authenticated users to override server routes. App and Endpoint configuration accepts a user-defined path that conflicts with an existing application or system route instead of rejecting the duplicate. Access requires permission to create or modify Apps or Endpoints; a conflicting path causes unintended request routing and service interruption.

The record

CVE
CVE-2026-3563
Published
Mar 17, 2026
Updated
Mar 17, 2026
Vendor
Ironman Software
Product
PowerShell Universal
Classifications
CWE-1289, T1499
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2026.1.0 <2026.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Ironman Software · PowerShell Universalversion=2026.1.0 <2026.1.4

Published CVSS scores

5.5Devolutions Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1289Improper Validation of Unsafe Equivalence in Input
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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