CVE-2026-3204

CRITICAL
2026-03-03 [email protected]
9.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:05 vuln.today
CVE Published
Mar 03, 2026 - 22:16 nvd
CRITICAL 9.8

Tags

Code Injection Devolutions Server

Description

Improper input validation in the error message page in Devolutions Server 2025.3.16 and earlier allows remote attackers to spoof the displayed error message via a specially crafted URL.

Analysis

Input validation flaw in Devolutions Server error message page enables remote spoofing attacks.

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Remediation

Within 24 hours: Inventory all Devolutions Server instances and confirm versions running 2025.3.16 or earlier; notify security teams and prepare incident response procedures. Within 7 days: Implement WAF rules to detect and block malicious URL patterns targeting error pages; restrict direct internet access to Devolutions Server where possible through network segmentation. …

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Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +49
POC: 0

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CVE-2026-3204 vulnerability details – vuln.today
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