dbcve.org
Virtual Apps And DesktopsApplication · Citrix

CVE-2025-6759

HIGH · 7.8 CVSS v3.1 Published 2025-07-08
Fix available
A fix is available. Upgrade to 2503 or later.
See remediation →
80/100
Remediation priority · High
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Local Privilege escalation allows a low-privileged user to gain SYSTEM privileges in Windows Virtual Delivery Agent for CVAD and Citrix DaaS

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A local privilege escalation vulnerability in Windows Virtual Delivery Agent (VDA) for Citrix Virtual Apps and Desktops (CVAD) and Citrix DaaS allows a low-privileged user to gain SYSTEM-level privileges, potentially enabling full compromise of the virtual desktop environment.

MitigationApply the vendor-provided security update for the Virtual Delivery Agent as soon as possible to prevent low-privileged users from escalating to SYSTEM privileges.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Virtual Apps And DesktopsApplication
Affected:< 2503= 2402

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm VDA installation
    Check if Citrix Virtual Delivery Agent is installed on the Windows system by reviewing installed programs in Add/Remove Programs or using 'Get-WmiObject Win32_Product' or reviewing the registry at HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall
    Affected if Citrix Virtual Delivery Agent is not found, the system is not affected by this specific vulnerability
  2. Identify VDA version
    Locate the installed VDA version by checking the program's properties in Add/Remove Programs, or check the registry key for the installed version, or run 'vda Version' from the VDA installation directory if the command-line tools are available
    Affected if The installed version cannot be determined or the VDA version is not displayed
  3. Compare against affected versions
    Compare the identified VDA version number to the affected ranges: versions lower than 2503, or exactly version 2402
    Affected if The installed VDA version is less than 2503 (such as 2502, 2501, 2402, etc.) or is exactly version 2402
  4. Verify VDA service is running
    Check if the Citrix Virtual Delivery Agent service is running using Services.msc or by running 'Get-Service BrokerAgent' or 'Get-Service vda*' in PowerShell
    Affected if The VDA service is running and the version is in the affected range (< 2503 or = 2402)

If the Citrix Virtual Delivery Agent is installed and the running version is either exactly 2402 or any version lower than 2503, the environment is affected by this privilege escalation vulnerability.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2503 or later
Fixed in 2503
Interim mitigation

Apply the vendor-provided security update for the Virtual Delivery Agent as soon as possible to prevent low-privileged users from escalating to SYSTEM privileges.

Recommended fix High confidence

Citrix Virtual Apps and Desktops version 2503 or later

  1. Identify the current version of the Citrix Virtual Delivery Agent (VDA) installed on the affected Windows machines
  2. Download Citrix Virtual Apps and Desktops version 2503 or later from the Citrix download portal at citrix.com/downloads
  3. Plan the upgrade during a maintenance window as VDA upgrades may require machine restarts
  4. Run the VDA installation/upgrade with appropriate administrative credentials
  5. Verify the VDA version post-upgrade to confirm installation of version 2503 or later
  6. Test that the low-privileged user no longer has the ability to escalate to SYSTEM privileges
Caveat VDA upgrades typically require machine restarts and may temporarily disrupt active sessions; ensure proper change management and user communication

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Virtual Apps And Desktops Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,280
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,648.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-6759 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data