CVE-2026-5171: devolutions server Access Control Flaw

Description

Improper access control in the entry activity log feature in Devolutions Server allows an authenticated user with access to an entry but without the required permission to retrieve that entry's activity logs via a crafted API request. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0 * Devolutions Server 2025.3.20.0 and earlier

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CVSS v3.1 Score

4.3

MEDIUM

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

EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-284 CWE-284

Affected Products

Vendor	Product	Versions
devolutions	devolutions_server	< 2025.3.22.0
devolutions	devolutions_server	2026.1.6.0 — 2026.1.19.0

References

Advisories & Patches

https://devolutions.net/security/advisories/DEVO-2026-0013/

Frequently Asked Questions

What is CVE-2026-5171? +

Improper access control in the entry activity log feature in Devolutions Server allows an authenticated user with access to an entry but without the required permission to retrieve that entry's activity logs via a crafted API request. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0 * Devolutions Server 2025.3.20.0 and earlier It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-5171? +

CVE-2026-5171 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0021, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-5171? +

CVE-2026-5171 affects products from devolutions, specifically: devolutions_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-5171? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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