CVE-2025-6523

Name: CVE-2025-6523
Creator: NVD / NIST
Published: 2025-07-22T17:15:33.9+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.5/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2025-6523 is a critical-severity vulnerability rated 9.5/10 on the CVSS scale. Use of weak credentials in emergency authentication component in Devolutions Server allows an unauthenticated attacker to bypass authentication via brute forcing the short emergency codes generated by the server within a feasible timeframe. This issue affects the following versions : * Devolutions Server 2025.2.2.0 through 2025.2.3.0 * Devolutions Server 2025.1.11.0 and earlier. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

Use of weak credentials in emergency authentication component in Devolutions Server allows an unauthenticated attacker to bypass authentication via brute forcing the short emergency codes generated by the server within a feasible timeframe. This issue affects the following versions : * Devolutions Server 2025.2.2.0 through 2025.2.3.0 * Devolutions Server 2025.1.11.0 and earlier

Metrics

CVSS 3.1

7.7/10

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

CVSS 4.0

9.5/10

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.39%

31.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1391

Affected Software

Vendor	Product	Versions
Devolutions	Devolutions Server	<= 2025.1.11.0
Devolutions	Devolutions Server	>= 2025.2.2.0, < 2025.2.4.0

References

https://devolutions.net/security/advisories/DEVO-2025-0012/Vendor Advisory

Timeline

Published: Jul 22, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-6523?

How severe is CVE-2025-6523?

CVE-2025-6523 has a CVSS score of 9.5/10 (CRITICAL severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2025-6523?

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-2025-6523?

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

Scan your code now

Source: NVD / NIST