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Application Delivery Controller FirmwareOperating system · Citrix

CVE-2020-8194

MEDIUM · 6.5 CVSS v3.1 Published 2020-07-10
Fix available
A fix is available. Upgrade to 10.2.7 / 10.5-70.18 or later.
See remediation →
72/100
Remediation priority · Elevated
Remotely reachable No privileges

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
Reflected code injection in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 allows the modification of a file download.

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

Reflected code injection vulnerability in Citrix ADC, Citrix Gateway, and SD-WAN WAN-OP allows unauthenticated attackers to modify file downloads through malicious payload injection in web requests. The vulnerability exploits the file download mechanism by reflecting user-supplied input into download responses, potentially enabling delivery of malicious content to end users.

MitigationUpgrade Citrix ADC/Gateway to fixed versions (13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14, or 10.5-70.18) and SD-WAN WAN-OP to versions 11.1.1a, 11.0.3d, or 10.2.7 as specified in the vendor advisory.

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
Application Delivery Controller FirmwareOperating system
Affected:>= 10.5, < 10.5-70.18>= 11.1, < 11.1-64.14>= 12.0, < 12.0-63.21>= 12.1, < 12.1-57.18>= 13.0, < 13.0-58.30
Netscaler Gateway FirmwareOperating system
Affected:>= 10.5, < 10.5-70.18>= 11.1, < 11.1-64.14>= 12.0, < 12.0-63.21>= 12.1, < 12.1-57.18
Gateway FirmwareOperating system
Affected:>= 13.0, < 13.0-58.30
Sd Wan WanopOperating system
Affected:>= 10.2, < 10.2.7>= 11.0, < 11.0.3d>= 11.1, < 11.1.1a

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
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

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

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. Identify the installed Citrix product
    Access the management interface or run 'show version' via SSH/console. Look for product name: Citrix ADC, NetScaler Gateway, Citrix Gateway, or SD-WAN WAN-OP.
    Affected if The product is any of ADC, Gateway (Netscaler or Citrix), or SD-WAN WAN-OP.
  2. Check the firmware version
    Run 'show version' or view the version displayed on the login page. Compare against these affected ranges: ADC/Gateway 10.5 before 70.18, 11.1 before 64.14, 12.0 before 63.21, 12.1 before 57.18, 13.0 before 58.30; SD-WAN WAN-OP 10.2 before 10.2.7, 11.0 before 11.0.3d, 11.1 before 11.1.1a.
    Affected if The installed version falls within any of the affected ranges listed.
  3. Verify web management interface accessibility
    Confirm whether the ns-gui or web management interface is reachable. Check firewall rules and listen addresses: 'show ns ip' or review network access control lists.
    Affected if The management interface is accessible from untrusted networks.
  4. Confirm file download feature is enabled
    The file download mechanism is part of the standard web interface. Check if /netscaler/path/file downloads are reachable by attempting a request to the GUI endpoint.
    Affected if The web interface with file download functionality is exposed.

The environment is affected if the product is Citrix ADC, Gateway, or SD-WAN WAN-OP with a firmware version within the affected ranges and the web management interface is accessible.

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.

From vendor data
Upgrade available Upgrade to 10.2.7 / 10.5-70.18 / 11.0.3d or later
Fixed in 10.2.710.5-70.1811.0.3d
Interim mitigation

Upgrade Citrix ADC/Gateway to fixed versions (13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14, or 10.5-70.18) and SD-WAN WAN-OP to versions 11.1.1a, 11.0.3d, or 10.2.7 as specified in the vendor advisory.

Fix this in Application Delivery Controller Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,080
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,328.

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-2020-8194 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