CVE-2021-34803
HIGHCVSS 7.8/10EPSS 0.47%
Last modified
CVE-2021-34803 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. TeamViewer before 14.7.48644 on Windows loads untrusted DLLs in certain situations.. EPSS estimates a 0.47% chance of exploitation in the next 30 days.
Description
TeamViewer before 14.7.48644 on Windows loads untrusted DLLs in certain situations.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Teamviewer | Teamviewer | < 9.0.259145 |
| Teamviewer | Teamviewer | >= 10.0.2551, < 10.0.259144 |
| Teamviewer | Teamviewer | >= 11.0.90968, < 11.0.259143 |
| Teamviewer | Teamviewer | >= 12.0.92876, < 12.0.259142 |
| Teamviewer | Teamviewer | >= 13.0.5058, < 13.2.36222 |
| Teamviewer | Teamviewer | >= 14.0.8346, < 14.2.56678 |
| Teamviewer | Teamviewer | >= 14.3.4730, < 14.7.48644 |
References
- https://community.teamviewer.com/English/discussion/111147/windows-v9-0-259145Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111149/windows-v10-0-259144Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111150/windows-v11-0-259143Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111151/windows-v12-0-259142Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111152/windows-v13-2-36222Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111153/windows-v14-2-56678Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111154/windows-v14-7-48644Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111147/windows-v9-0-259145Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111149/windows-v10-0-259144Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111150/windows-v11-0-259143Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111151/windows-v12-0-259142Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111152/windows-v13-2-36222Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111153/windows-v14-2-56678Release Notes, Vendor Advisory
- https://community.teamviewer.com/English/discussion/111154/windows-v14-7-48644Release Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-34803?
TeamViewer before 14.7.48644 on Windows loads untrusted DLLs in certain situations.
How severe is CVE-2021-34803?
CVE-2021-34803 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.
How do I fix CVE-2021-34803?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-34803?
Run a free Strix scan to check your systems for this vulnerability.
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