Home/CVE/This vulnerability allows remote attackers to execute arbitrary code on affected installations of TeamViewer 15.16.8.0.
CVE

CVE-2021-34859

This vulnerability allows remote attackers to execute arbitrary code on affected installations of TeamViewer 15.16.8.0.

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.

HIGH · CVSS 8.8 EPSS 0.0134
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules4 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787Out-of-bounds Write
▤

Affected Products & Versions

1
teamviewerall versions
◈

Sigma Hunt Rules

4
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumTeamViewer Remote Session
productmediumInstallation of TeamViewer Desktop
productmediumTeamViewer Domain Query By Non-TeamViewer Application
productlowTeamViewer Log File Deleted
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · zdi-disclosures@trendmicro.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD25 Oct 2021 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://community.teamviewer.com/English/discussion/117794/august-updates-security-patches/p1PatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1003/Third Party AdvisoryVDB Entry
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