ZDF
Sign inSign up

Vulnerabilities

Vulnerability · 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 spec…

Published Mar 3, 2026 · catalog updated Jun 17, 2026 · devolutions server

Check if you run it

No confirmed exploitation is on record for CVE-2026-3204. EPSS is 0.65%. Act only if a listed version of devolutions server is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.65%
Remediation
Version ranges on file
Affected products
cpe devolutions/devolutions server · stated devolutions server

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe devolutions/devolutions serverversion unspecified
  • stated devolutions server<= 3.16

How to fix CVE-2026-3204

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-3204. EPSS is 0.65%. Act only if a listed version of devolutions server is installed.

Which versions are affected?

Compare what you have installed with devolutions server <= 3.16. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-20: Improper Input Validation. EPSS 0.65%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 3, 2026 · NIST NVD

    Detected

    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.

  2. Jun 17, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-3204

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-3204

    30-day exploitation probability 0.6%

    first.org
  • NIST NVDVulnerability recordCVE-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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.