CVE-2026-23569
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 · uneditedAn out-of-bounds read vulnerability in the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows a remote attacker to leak stack memory and cause a denial of service via a crafted request. The leaked stack memory could be used to bypass ASLR remotely and facilitate exploitation of other vulnerabilities on the affected system.
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 confidenceOut-of-bounds read vulnerability in the TeamViewer DEX Client (formerly 1E Client) Content Distribution Service (NomadBranch.exe) allows remote attackers to leak stack memory via crafted requests, potentially bypassing ASLR and facilitating further exploitation. The vulnerability affects versions prior to 26.1 for Windows.
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< 26.1CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/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 checksWork through these to decide whether this CVE applies to you.
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Locate TeamViewer DEX Client installationSearch for NomadBranch.exe in typical installation paths such as C:\Program Files\1E\Client\ or C:\Program Files\TeamViewer\Digital Employee Experience\, or use Get-Process to check if NomadBranch.exe is runningAffected if NomadBranch.exe is present on the system
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Determine installed version of NomadBranch.exeRight-click NomadBranch.exe, select Properties, and view the File Version field, or run (Get-Item 'C:\Program Files\1E\Client\NomadBranch.exe').VersionInfo to retrieve version programmaticallyAffected if Version displays as a number lower than 26.1 (for example 26.0, 25.x, or any earlier version)
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Verify Content Distribution Service statusOpen Services.msc and locate the 1E Client Content Distribution service, or run Get-Service -Name '1E Client Content Distribution' to confirm it is runningAffected if The Content Distribution Service (NomadBranch.exe) is installed and actively running
Your environment is affected if TeamViewer DEX Client / 1E Client with NomadBranch.exe is installed with a version lower than 26.1 and the Content Distribution Service is enabled.
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 · scoped26.1
Update TeamViewer DEX Client to version 26.1 or later to patch the out-of-bounds read vulnerability.
TeamViewer DEX Client version 26.1 for Windows
- Navigate to the official TeamViewer download page at www.teamviewer.com
- Locate and download the Digital Employee Experience (DEX) Client version 26.1 or later for Windows
- Verify the downloaded installer is version 26.1 or higher before proceeding
- Stop the Content Distribution Service (NomadBranch.exe) if currently running
- Run the installer and follow the on-screen prompts to upgrade the TeamViewer DEX Client
- Confirm the installation completed successfully by checking the version in the application
- Restart the Content Distribution Service (NomadBranch.exe)
Generated from the published advisory — verify against the referenced sources before acting.
- 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-2026-23569 — 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-2026-23569 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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