Vulnerability · Published Mar 3, 2026 · Assigned by DEVOLUTIONS
CVE-2026-3204
Critical 9.8
In plain English
A critical-severity improper input validation in Server from Devolutions. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.6%top 51.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Devolutions | Server | 0 – through 2025.3.16 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H