Full Client: Improper Privilege Management
CVE-2026-111583 is a high-severity improper privilege management vulnerability in Full Client from TeamViewer, with a CVSS 3.1 base score of 7.3 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, but only if a user takes part, for example by opening a link or file. The record lists versions 15.82, 15.64.10 (Legacy windows 7 & 8) as the first without the flaw, so updating Full Client to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.19% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Full Client to 15.82 or 15.64.10 (Legacy windows 7 & 8), whichever matches your release line, or a later version.
- Update Host to 15.82 or 15.64.10 (Legacy Windows 7 & 8), whichever matches your release line, or a later version.
- Read the advisory on teamviewer.com for workarounds and exact fixed builds.
- Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| TeamViewer | Full Client | before 15.82; 15.64.0 (Legacy windows 7 & 8) up to, but not including, 15.64.10 (Legacy windows 7 & 8) | 15.82, 15.64.10 (Legacy windows 7 & 8) |
| TeamViewer | Host | before 15.82; 15.64.0 (Legacy Windows 7 & 8) up to, but not including, 15.64.10 (Legacy Windows 7 & 8) | 15.82, 15.64.10 (Legacy Windows 7 & 8) |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- RequiredA user must take an action such as opening a file or link.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H. Scored by CNA (teamviewer.com).
Official description
Improper access control in the installer staging directory used by TeamViewer Full Client and Host prior to version 15.82 for Windows during installation of Advanced Asset Management allows a local authenticated user with low privileges to execute arbitrary commands as SYSTEM. An attacker can place a crafted installer options file that is processed by the Advanced Asset Management installer during service activation.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Privilege Management
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
How developers prevent this class of flaw
- Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
- Follow the principle of least privilege when assigning access rights to entities in a software system.
- Consider following the principle of separation of privilege. Require multiple conditions to be met before permitting access to a system resource.
More Improper Privilege Management vulnerabilities (CWE-269)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Full Client
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 8.8 High severity
- 8.8 High severity
- 7.0 High severity
Recent Improper Privilege Management vulnerabilities
- 8.8 High severity
- 7.3 High severity
- 7.3 High severity
- 9.8 Critical severity
- 8.8 High severity
- 7.8 High severity
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