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TI-2021-13848 Aliases CVE-2021-34858GHSA-65hf-6m93-q9jf

Out-of-bounds read in TeamViewer

Priority MEDIUM 40CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.03677 89th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
TeamViewerTeamViewer15.16.8.0—No fix listedCNA
  • TeamViewer VendorTeamViewer Affected 15.16.8.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:teamviewer:teamviewer:*:*:*:*:*:*:*:*before 15.21.2VulnerableTeamViewer
  • cpe:2.3:a:teamviewer:teamviewer:*:*:*:*:*:*:*:* Versions before 15.21.2 Vulnerable ·TeamViewer

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-34858
  2. 2026-10-03 Alias added: GHSA-65hf-6m93-q9jf

References

Advisory 2

  • TI-2019-13681 TeamViewer Desktop through 14.7.1965 allows a bypass of remote-login access control… KEVCVSS 3.1HIGH 7.0
  • TI-2020-10745 TeamViewer Desktop for Windows before 15.8.3 does not properly quote its custom URI… CVSS 3.1HIGH 8.8
  • TI-2010-02989 Untrusted search path vulnerability in TeamViewer 5.0.8703 and earlier allows local… CVSS 2.0HIGH 9.3
  • TI-2021-13849 Memory corruption in TeamViewer CVSS 3.1HIGH 8.8
  • TI-2018-11870 TeamViewer 10.x through 13.x allows remote attackers to bypass the brute-force… CVSS 3.0CRITICAL 9.8
  • TI-2019-13268 In Omron CX-Supervisor, Versions 3.5 (12) and prior, Omron CX-Supervisor ships with… CVSS 3.1HIGH 8.8
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences