CVE-2025-64986
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 · uneditedA command injection vulnerability was discovered in TeamViewer DEX (former 1E DEX), specifically within the 1E-Explorer-TachyonCore-DevicesListeningOnAPort instruction prior V21. Improper input validation, allowing authenticated attackers with Actioner privileges to inject arbitrary commands. Exploitation enables remote execution of elevated commands on devices connected to the platform.
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 confidenceA command injection vulnerability in TeamViewer DEX's 1E-Explorer-TachyonCore-DevicesListeningOnAPort instruction (versions prior to V21) allows authenticated attackers with Actioner privileges to inject arbitrary commands due to improper input validation, enabling remote execution of elevated commands on connected devices.
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< 21.0CVSS 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
- Network
- Complexity
- Low
- Privileges
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/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 checksWork through these to decide whether this CVE applies to you.
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Identify TeamViewer DEX installationLocate the TeamViewer Digital Employee Experience or TachyonCore installation on the system. Check for the presence of TachyonCore components or the TeamViewer DEX management console.Affected if TeamViewer DEX or TachyonCore is installed on the system
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Determine installed TachyonCore versionAccess the TachyonCore management interface or check the installed software version. Look for version information in the DEX console or installed components.Affected if The installed version is prior to version 21.0 (e.g., 20.x, 19.x, etc.)
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Verify DevicesListeningOnAPort instruction availabilityCheck if the 1E-Explorer-TachyonCore-DevicesListeningOnAPort instruction is present and enabled in the TachyonCore instruction library or policy configuration.Affected if The DevicesListeningOnAPort instruction is available and enabled in the environment
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Confirm Actioner role assignmentReview user role assignments in the TeamViewer DEX administration console to determine which users or groups have Actioner privileges.Affected if Any user account with Actioner privileges exists in the system
A user is affected if they have TeamViewer DEX with TachyonCore version prior to 21.0 installed AND the DevicesListeningOnAPort instruction is enabled AND users with Actioner privileges exist in the environment.
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.
dbcve · scoped21.0
Upgrade to TeamViewer DEX TachyonCore version 21 or later to obtain the patched input validation in the DevicesListeningOnAPort instruction.
TeamViewer DEX (1E DEX) version 21.0
- Confirm the current version of TeamViewer DEX (formerly 1E DEX) by checking the deployed instance
- If the version is below 21.0, plan for an upgrade to version 21.0 or later
- Download the version 21.0 release from the official TeamViewer vendor channels
- Review release notes for any prerequisite configurations or migration steps
- Execute the upgrade following TeamViewer's standard upgrade procedure for DEX components
- Verify the upgrade was successful by checking the version number post-installation
- Test the 1E-Explorer-TachyonCore-DevicesListeningOnAPort functionality to ensure it operates correctly after the fix
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation3.0 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-2025-64986 — 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-2025-64986 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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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.
- 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