TeamViewer Full Client: Out-of-bounds write in screen-image decoder allows code execution
Summary
TeamViewer Full Client for Linux and macOS prior to version 15.83 contains an out-of-bounds write in the screen-image decoder. A remote attacker can execute arbitrary code by sending crafted screen-image data during a remote-control session, or by persuading a user to open a crafted TeamViewer session recording (.tvs). Exploitation requires user interaction.
Affected
- TeamViewer Full Client for Linux and macOS prior to 15.83
- Legacy 14.7 branch for Linux and macOS prior to 14.7.48868
- Legacy 13.2 branch: Linux prior to 13.2.154008, macOS prior to 13.2.154007
Fixed in
- Current branch: 15.83 or later
- Legacy 14.7: 14.7.48868
- Legacy 13.2: 13.2.154008 (Linux), 13.2.154007 (macOS)
Workaround
Unknown. The vendor lists no workaround; update is the only documented remedy.
Exploitation
- The vendor reports no known active exploitation at publication.
- Not listed in the CISA KEV catalog at the time of research.
- No public exploit code found in Metasploit or Exploit-DB; VulDB lists no exploit available.
- Status as of 31 Oct 2026; the window since disclosure (27 Oct 2026) is short.
Our recommendation
- Update TeamViewer Full Client and Host on Linux and macOS to 15.83 or the matching legacy build as soon as possible.
- Inventory all TeamViewer installations, including Host and Portable copies.
- Prioritise helpdesk and support workstations that connect to external partners.
- Avoid opening .tvs files from untrusted sources and avoid sessions with unknown hosts until patched.
- Also patch CVE-2026-111585 (integer overflow, Windows, Linux, macOS, Android) and CVE-2026-92374 (macOS local privilege escalation) from the same bulletin.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- TeamViewer Security Bulletin TV-2026-1011 www.teamviewer.com
- VulDB entry 427401 vuldb.com
- Cybersecuritynews: TeamViewer desktop session vulnerabilities cybersecuritynews.com
- The Hacker Wire: CVE-2026-92372 www.thehackerwire.com
- PBX Science: TeamViewer 15.83.3 release pbxscience.com
- Heise: TeamViewer fixes code injection vulnerability www.heise.de
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 10:12.
Original description (NVD)
An out-of-bounds write vulnerability in the screen-image decoder of TeamViewer Full Client for Linux and macOS prior to version 15.83 allows a remote attacker to execute arbitrary code by supplying crafted screen-image data during a remote-control session. The vulnerability can also be exploited by persuading a user to open a specially crafted TeamViewer session recording (.tvs). Missing destination bounds checking in the decoder allows crafted screen-image data to cause an out-of-bounds write to the image buffer. Exploitation requires user interaction.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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