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Pcoip ClientApplication · Teradici

CVE-2021-25701

MEDIUM · 5.5 CVSS v3.1 Published 2021-07-21
Fix available
A fix is available. Upgrade to 21.07.0 or later.
See remediation →
57/100
Remediation priority · Elevated
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
The fUSBHub driver in the PCoIP Software Client prior to version 21.07.0 had an error in object management during the handling of a variety of IOCTLs, which allowed an attacker to cause a denial of service.

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 · high confidence

The fUSBHub driver in PCoIP Software Client versions prior to 21.07.0 contains an object management error when handling specific IOCTL requests. This driver-level flaw can be exploited locally to trigger a denial of service condition, likely through improper handling of driver objects leading to a crash or system instability.

MitigationUpgrade PCoIP Software Client to version 21.07.0 or later to obtain the vendor patch addressing the object management error in the fUSBHub driver.

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
Pcoip ClientApplication
Affected:< 21.07.0

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
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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. Identify installed PCoIP Software Client version
    Locate and inspect the installed PCoIP Client software version on the system, typically found in program files, add/remove programs, or via command-line version query if available
    Affected if The installed version is below 21.07.0
  2. Locate fUSBHub driver on the system
    Search for the fUSBHub driver file (.sys) in the PCoIP installation directory or Windows system driver folder
    Affected if The fUSBHub driver file exists on the system, indicating the vulnerable driver component is present
  3. Verify USB redirection is enabled
    Check PCoIP client configuration settings or registry for USB device redirection options, which activates the fUSBHub driver functionality
    Affected if USB redirection is enabled or configured, meaning the vulnerable driver code path can be triggered

A system is affected if it runs PCoIP Software Client version below 21.07.0 with the fUSBHub driver present and USB redirection enabled, as this combination allows the object management error to be exploited locally.

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 21.07.0 or later
Fixed in 21.07.0
Interim mitigation

Upgrade PCoIP Software Client to version 21.07.0 or later to obtain the vendor patch addressing the object management error in the fUSBHub driver.

Fix this in Pcoip Client Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing4.0 h
  • Review / QA2.0 h
9.0 hours of engineering $1,540
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,464.

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-2021-25701 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