CVE-2017-5581: Buffer overflow in the ModifiablePixelBuffer::fillRect function in TigerVNC before 1.7.1 allows remote serv...

Security readout for executives and security teams

CVE-2017-5581 is a TigerVNC client-side memory corruption issue fixed in 1.7.1. A malicious or compromised VNC server could send a crafted RRE update that may let it run code on the connecting client. Business risk is highest where administrators connect TigerVNC clients to untrusted or poorly controlled remote systems. Exposure is likely limited to systems running TigerVNC before 1.7.1, especially users or administrators who connect the client to remote VNC servers. The bundle does not provide complete affected CPE data, so package-level validation is required. Prioritize remediation for administrator workstations and jump hosts using TigerVNC. The impact can be code execution on the client, but exploitation requires interaction with a malicious or compromised VNC server. No active exploitation evidence is provided in the source bundle. Mitigation focus: Upgrade TigerVNC to 1.7.1 or a vendor-patched package.; Apply relevant Red Hat or Gentoo security updates where applicable.; Avoid connecting TigerVNC clients to untrusted VNC servers..

Prepared

Jun 13, 2026, 06:02 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.