Vulnerability handling in Fortinet FortiSandbox

Fortinet has identified a vulnerability in FortiSandbox. This vulnerability relates to an exposure or resource issue with the wrong spheres CWE-668 in the VNC-server component used within FortiSandbox’s scanning virtual machines. Unauthorized attackers can send network requests to gain access to...

EUVD-2026-43710

A exposure of resource to wrong sphere vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.2, FortiSandbox 4.4.3 through 4.4.8 may allow an unauthenticated attacker to access the VNC server of VMs performing scanning via network requests...

Unauthenticated VNC access exposed on all interfaces

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CVE-2026-59835: Exposure of Resource to Wrong Sphere

A exposure of resource to wrong sphere vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.2, FortiSandbox 4.4.3 through 4.4.8 may allow an unauthenticated attacker to access the VNC server of VMs performing scanning via network requests...

RLSA-2026:37130 Important: gstreamer1-plugins-bad-free security update

GStreamer is a streaming media framework based on graphs of filters which operate on media data. The gstreamer1-plugins-bad-free package contains a collection of plug-ins for GStreamer. Security Fixes: gstreamer1-plugins-bad-free: GStreamer: Heap buffer overflow via crafted VNC server rectangle i...

AlmaLinux 10 : gstreamer1-plugins-bad-free (ALSA-2026:36749)

The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:36749 advisory. gstreamer1-plugins-bad-free: GStreamer: Denial of service via AV1 tilelistobu parser byte/bit confusion CVE-2026-52718 gstreamer1-plugins-bad-free:...

ALSA-2026:37130 Important: gstreamer1-plugins-bad-free security update

GStreamer is a streaming media framework based on graphs of filters which operate on media data. The gstreamer1-plugins-bad-free package contains a collection of plug-ins for GStreamer. Security Fixes: gstreamer1-plugins-bad-free: GStreamer: Heap buffer overflow via crafted VNC server rectangle i...

Out-of-bounds Write

Overview Affected versions of this package are vulnerable to Out-of-bounds Write in the rfbsrc process when connecting to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates. An attacker can cause a process crash or potentially corrupt memory by...

SUSE-SU-2026:2428-1 Security update for LibVNCServer

This update for LibVNCServer fixes the following issues: - CVE-2026-44988: Fixed missing validation of rectangle width in tight gradient decoding can lead to server-triggered out-of-bounds write bsc1266459...

CVE-2026-52720

A heap buffer overflow vulnerability was found in GStreamer's librfb RFB/VNC client. The rectangle bounds check incorrectly validates area rather than individual dimensions, allowing a malicious VNC server to send a rectangle that extends beyond the framebuffer. A remote attacker could set up a...

RHEL 9 : tigervnc (RHSA-2026:20575)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:20575 advisory. Virtual Network Computing VNC is a remote display system which allows users to view a computing desktop environment not only on the machine...

CVE-2026-7251

Eppendorf BioFlo 320 uses a VNC server with a hard-coded password, allowing a remote attacker to gain full control of the user interface if the device address is known and remote access is enabled. VNC traffic is unencrypted, enabling interception or eavesdropping. Documents consistently describe...

TigerVNC: x0vncserver: TigerVNC x0vncserver: Information disclosure, data manipulation, and denial of service via incorrect permissions

A flaw was found in TigerVNC's x0vncserver component. Due to incorrect permissions in the Image.cxx file, other users on the system can observe or manipulate the screen contents of a running session. This vulnerability could also lead to an application crash, resulting in a Denial of Service DoS...

CVE-2026-42859

A flaw was found in neatvnc, a VNC server library. An unauthenticated remote attacker who can reach the VNC listening socket can send a crafted handshake with an oversized client RSA public key. This action causes a pre-authentication stack buffer overflow, leading to a denial of service due to a...

RHEL 8 : tigervnc (RHSA-2026:13414)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:13414 advisory. Virtual Network Computing VNC is a remote display system which allows users to view a computing desktop environment not only on the machine...

Medium: libvncserver

Issue Overview: LibVNCServer versions 0.9.15 and prior fixed in commit 009008e contain a heap out-of-bounds read vulnerability in the UltraZip encoding handler that allows a malicious VNC server to cause information disclosure or application crash. Attackers can exploit improper bounds checking i...

CVE-2019-25600

UltraVNC Viewer 1.2.2.4 contains a denial of service vulnerability that allows attackers to crash the application by supplying an oversized string to the VNC Server input field. Attackers can paste a malicious string containing 256 repeated characters into the VNC Server field and click Connect t...

CVE-2019-25600 UltraVNC Viewer 1.2.2.4 Denial of Service via Buffer Overflow

UltraVNC Viewer 1.2.2.4 contains a denial of service vulnerability that allows attackers to crash the application by supplying an oversized string to the VNC Server input field. Attackers can paste a malicious string containing 256 repeated characters into the VNC Server field and click Connect t...

CVE-2019-25600

UltraVNC Viewer 1.2.2.4 contains a denial of service vulnerability that allows attackers to crash the application by supplying an oversized string to the VNC Server input field. Attackers can paste a malicious string containing 256 repeated characters into the VNC Server field and click Connect t...

CVE-2020-37134

UltraVNC Viewer 1.2.4.0 contains a denial of service vulnerability that allows attackers to crash the application by manipulating VNC Server input. Attackers can generate a malformed 256-byte payload and paste it into the VNC Server connection dialog to trigger an application crash...