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ReviewHigh

CVE-2026-16444

TeamViewer Full Client, Host, QuickSupport & Portable, Full Client, Host, QuickSupport & Portable (for Windows 7 & 8), Full Client, Host, QuickSupport (v14 for Windows)

Improper neutralization of path traversal sequences in TeamViewer Desktop Clients prior Version 15.81.5 allows an authenticated remote session participant to write files to unintended locations on the local file system via file transfer or virtual file clipboard mechanisms. An attacker can leverage this behavior to achieve arbitrary file write and potentially execute code with the privileges of the affected user.

CVSS
7.5
EPSS
0.26%
17.2% percentile
CISA KEV
Not listed
Published
2026.08.26
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.26%
Technical severityCVSS 7.5

Vulnerability overview

Improper neutralization of path traversal sequences in TeamViewer Desktop Clients prior Version 15.81.5 allows an authenticated remote session participant to write files to unintended locations on the local file system via file transfer or virtual file clipboard mechanisms. An attacker can leverage this behavior to achieve arbitrary file write and potentially execute code with the privileges of the affected user.

Affected product and versions

Product
TeamViewer Full Client, Host, QuickSupport & Portable, Full Client, Host, QuickSupport & Portable (for Windows 7 & 8), Full Client, Host, QuickSupport (v14 for Windows)
Affected versions
>= 15.0 < 15.81.5, >= 15.64.0 < 15.64.7, >= 14.0 < 14.7.48833, >= 14.0 < 14.7.48838, >= 13.0 < 13.2.36229, >= 13.0 < 13.2.153978, >= 13.0 < 13.2.153981
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that TeamViewer Full Client, Host, QuickSupport & Portable, Full Client, Host, QuickSupport & Portable (for Windows 7 & 8), Full Client, Host, QuickSupport (v14 for Windows) and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-73