CVE-2021-34859

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-10-25 · updated 2026-06-17
Weakness: CWE-119

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.

Affected products

TeamViewer: 15.16.8.0

References

https://community.teamviewer.com/English/discussion/117794/august-updates-security-patches/p1
https://www.zerodayinitiative.com/advisories/ZDI-21-1003/
https://community.teamviewer.com/English/discussion/117794/august-updates-security-patches/p1
https://www.zerodayinitiative.com/advisories/ZDI-21-1003/

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