TeamViewer fixes critical vulnerability allowing host-to-viewer attacks

TeamViewer CVE-2026-111585 remote desktop security buffer overflow cybersecurity vulnerability

TeamViewer has released version 15.83 to address three security vulnerabilities, including a high-severity flaw tracked as CVE-2026-111585. This specific vulnerability, which carries a CVSS score of 8.8, allows a malicious or compromised host machine to attack the viewer (the computer initiating the remote control session).

The flaw is caused by a buffer overflow that occurs when the viewer calculates the size of a screen image provided by the host. By sending manipulated screen data, a host can cause the viewer’s session to crash. On Windows systems, researchers at Remedio demonstrated that the flaw could potentially be used to bypass operating system defenses and execute arbitrary code on the viewer’s computer.

Affected software includes the TeamViewer Full Client on Windows, Linux, and macOS, the Windows Portable edition, and the Android Remote Control app. While the primary vulnerability affects the viewer, TeamViewer’s update also addresses two other flaws that impact the Host software, making the update critical for all users.

Entities

ChatGPT · Linux · Omri Dar · OpenAI · Parameter · Remedio · TeamViewer · macOS · windows

Claims

What the coverage asserts, and how many sources carry each claim.

[● 3 SOURCES] No active exploits of these vulnerabilities have been reported by TeamViewer. www.drweb.de · sempreupdate.com.br
[● 3 SOURCES] Affected software includes the TeamViewer Full Client on Windows, Linux, and macOS, the Windows Portable edition, and the Android Remote Control app. www.drweb.de · sempreupdate.com.br
[● 3 SOURCES] TeamViewer released version 15.83 to fix three security vulnerabilities. www.drweb.de · sempreupdate.com.br
[● 3 SOURCES] The vulnerability CVE-2026-111585 has a CVSS score of 8.8. www.drweb.de · sempreupdate.com.br
[● 3 SOURCES] A malicious host can exploit the flaw to crash the viewer’s TeamViewer session. www.drweb.de · sempreupdate.com.br
[● 3 SOURCES] On Windows, the flaw can allow an attacker to run code on the viewer’s computer. www.drweb.de · sempreupdate.com.br
[● 3 SOURCES] The vulnerability is caused by a buffer overflow when calculating screen image size. www.drweb.de · sempreupdate.com.br

Sources

New TeamViewer Security Flaw Could Turn Routine Remote Support Sessions Into Computer Takeovers [cybernoz.com]

4 days ago

Schwere TeamViewer-Sicherheitslücke: Ein präparierter Rechner kann den PC des Technikers übernehmen [www.drweb.de]

5 days ago

TeamViewer 15.83.5 - Software reviews, downloads, news, free trials, freeware and full commercial software - Downloadcrew [www.downloadcrew.com]

5 days ago

Falha no TeamViewer permite ataque a quem presta suporte remoto [sempreupdate.com.br]

5 days ago