CVE-2021-34859 json
This vulnerability allows remote attackers to execute arbitrary code on affected installations of TeamViewer 15.16.8.0.
published 2021-10-25 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21506
- cvss
- 7.8
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 8.9%
- EPSS 8.9% chance of exploitation in 30 days, percentile 95%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Exploit prediction
8.95% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.8 | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- TeamViewer TeamViewer
Classification
References
-
community.teamviewer.com
/English/discussion/117794/august-updates-security-patches/p1
patch, vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-21-1003/
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-34859
- NVD CVE-2021-34859
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