CVE-2021-25699
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 · uneditedThe OpenSSL component of the Teradici PCoIP Software Client prior to version 21.07.0 was compiled without the no-autoload-config option, which allowed an attacker to elevate to the privileges of the running process via placing a specially crafted dll in a build configuration directory.
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 confidenceThe Teradici PCoIP client used an OpenSSL build compiled without the no-autoload-config option, which allowed OpenSSL to load arbitrary DLLs from build configuration directories. A local attacker could place a specially crafted DLL in these directories to achieve code execution with the same privileges as the running PCoIP client process.
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< 21.07.0CVSS 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
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 checksWork through these to decide whether this CVE applies to you.
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Identify PCoIP Client installationLocate the Teradici PCoIP Client installation directory or executable on the system. Common locations include Program Files\Teradici or Program Files (x86)\Teradici. Check for pcoip.exe or similar PCoIP client executables.Affected if PCoIP Client is installed and the version cannot be determined or is not visible
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Determine installed PCoIP Client versionRight-click the PCoIP client executable, select Properties, and view the Details tab for the Version information. Alternatively, right-click and select Properties then the Version tab.Affected if The displayed version number is less than 21.07.0
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Compare version to affected rangeCompare the installed version against the affected range: any version below 21.07.0 is considered vulnerable. Version 21.07.0 and later are not affected.Affected if The installed version is below 21.07.0, indicating the OpenSSL component was compiled without the no-autoload-config option and could load arbitrary DLLs from configuration directories
The environment is affected if the installed Teradici PCoIP Client version is lower than 21.07.0.
Generated from the published advisory. Verify against your own configuration.
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 data21.07.0
Upgrade the Teradici PCoIP Software Client to version 21.07.0 or later, which includes a properly compiled OpenSSL component with the no-autoload-config option enabled.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-25699 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-25699 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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
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