High severity8.8NVD Advisory· Published Oct 25, 2021· Updated Jun 17, 2026
CVE-2021-34859
CVE-2021-34859
Description
This vulnerability allows remote attackers to execute arbitrary code on affected installations of TeamViewer 15.16.8.0. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of TVS files. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-13697.
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Affected products
3cpe:2.3:a:teamviewer:teamviewer:15.16.8.0:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:teamviewer:teamviewer:15.16.8.0:*:*:*:*:*:*:*
- (no CPE)range: = 15.16.8.0
- (no CPE)range: 15.16.8.0
Patches
Vulnerability mechanics
References
2- community.teamviewer.com/English/discussion/117794/august-updates-security-patches/p1nvdPatchVendor Advisory
- www.zerodayinitiative.com/advisories/ZDI-21-1003/nvdThird Party AdvisoryVDB Entry
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