CVE-2026-3204

Name: CVE-2026-3204
Creator: NVD / NIST
Published: 2026-03-03T22:16:29.397+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2026-3204 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.53%

40.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Devolutions	Devolutions Server	<= 2025.3.16.0

References

https://devolutions.net/security/advisories/DEVO-2026-0005Vendor Advisory

Timeline

Published: Mar 3, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-3204?

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.

How severe is CVE-2026-3204?

CVE-2026-3204 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2026-3204?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-3204?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST