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Devolutions Server EUVDEUVD-2026-33935

| CVE-2026-9590 MEDIUM
Improper Access Control (CWE-284)
2026-06-02 DEVOLUTIONS GHSA-3xh5-wf4g-97h5
5.3
CVSS 3.1 · Vendor: DEVOLUTIONS
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate with entry edit privileges
  2. Delivery
    Craft asset modification request
  3. Exploit
    Submit request bypassing permission validation
  4. Execution
    Modify unauthorized asset information
  5. Impact
    Alter PAM platform data integrity

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires the attacker to be authenticated to Devolutions Server with at least 'entry edit' privileges - this is an insider or compromised-account scenario, not an unauthenticated remote attack. The CVSS vector PR:N conflicts with this description-stated requirement and should be treated with caution until vendor clarification is available. The target system must be running Devolutions Server version 2026.1.19 or earlier. No special network positioning beyond connectivity to the Devolutions Server web interface is required (AV:N, AC:L). Exploitation is limited by the need for a valid authenticated session with entry edit rights; unauthenticated or unprivileged users cannot trigger this flaw. There is no user interaction required beyond the attacker's own actions.

Impact

The CVSS base score of 5.3 (Medium) with vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N presents a notable inconsistency with the vulnerability description: PR:N implies no authentication is required, yet the description explicitly states the attacker must be 'an authenticated user with entry edit privileges.' This conflict should be verified with the Devolutions vendor advisory at https://devolutions.net/security/advisories/DEVO-2026-0014/ before relying on the CVSS vector for access-control decisions. The realistic attack surface is therefore narrower than PR:N implies - exploitation requires an insider or compromised account with at least entry edit privileges. Impact is limited to integrity (I:L) with no confidentiality or availability consequence, reducing overall urgency. EPSS data was not provided; given the authenticated requirement and bounded impact, real-world exploitation probability is likely low. No KEV listing and no known POC further support treating this as a medium-priority issue, particularly relevant to organizations with untrusted internal users or contractor accounts in Devolutions Server deployments.

Exploit ScenarioDerived

An authenticated internal user or contractor who holds entry edit privileges in Devolutions Server sends a crafted API or UI request to the asset modification endpoint, omitting or bypassing the secondary permission check. The server's permission validation component fails to enforce the additional asset-modification gate, allowing the write operation to succeed. The attacker can alter asset metadata or configuration data they are not authorized to change, potentially manipulating privileged account records stored within the PAM platform.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Jun 02, 2026

Improper access control in Devolutions Server 2026.1.19 and earlier allows an authenticated user holding entry edit privileges to modify asset information beyond their authorized scope, bypassing the permission validation layer. The flaw resides in the permission validation component and enables privilege overreach within the platform's access control model - an authenticated low-privilege user can alter data they should have no write access to. No public exploit code has been identified at time of analysis, and the vulnerability is not listed in the CISA KEV catalog.

RemediationAI

Upgrade Devolutions Server beyond version 2026.1.19 per the vendor advisory at https://devolutions.net/security/advisories/DEVO-2026-0014/. An exact patched version number was not provided in the available data - consult the Devolutions advisory directly to confirm the specific release that resolves CVE-2026-9590 before upgrading. As a compensating control, organizations should audit and minimize the number of accounts granted 'entry edit' privileges to reduce the exposed attack surface, and review audit logs for any unexpected modifications to asset information that may indicate prior exploitation. Restricting the 'entry edit' role to only fully trusted users limits blast radius while a patched version is deployed. No significant side effects from the privilege scoping workaround are anticipated beyond operational overhead.

Affected VersionsENISA

Server 0 ≤2026.1.19

Affected Packages

euvd server no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Devolutions Server is a privileged access management (PAM) and credential vault platform. The vulnerability is classified under CWE-284 (Improper Access Control), indicating that the permission validation component fails to enforce the full set of required permissions before allowing a write operation on asset information. The flaw lies in the separation between 'entry edit' privileges and the distinct 'asset modification' permission - the system incorrectly conflates or short-circuits these checks, allowing a user with the former to perform actions gated behind the latter. Affected product is identified via CPE cpe:2.3:a:devolutions:server:*:*:*:*:*:*:*:*, covering all versions up to and including 2026.1.19. The tag 'Authentication Bypass' refers to a bypass of the secondary permission gate, not of authentication itself.

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Severity by source

Vendor (DEVOLUTIONS) PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Primary rating from Vendor (DEVOLUTIONS) · only source for this CVE.

CVSS VectorVendor: DEVOLUTIONS

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

2
CVSS changed
Jun 02, 2026 - 20:22 NVD
5.3 (MEDIUM)
CVE Published
Jun 02, 2026 - 14:07 nvd
UNKNOWN (no severity yet)

DescriptionCVE.org

Improper access control in the permission validation component in Devolutions Server 2026.1.19 and earlier allows an authenticated user with entry edit privileges to modify asset information without the required permission.

Threat Intelligence Overview

EPSS Score
0.0%
Top 91% exploitable
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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