CVE-2021-34858

HIGH
7.8
CVSS Score
Published: January 13, 2022 at 09:42 PM UTC
Updated: June 17, 2026 at 03:56 AM UTC
1 product affected across 1 vendorTeamViewer

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Severity
HIGH7.8
Exploit prediction
EPSS 4%

Description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of TeamViewer. 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 read past the end of an allocated structure. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-13606.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 15.21.215.16.8.0
Affected range stops below 15.21.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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