PT-2026-146110
CVE-2026-128321
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Published
2026-11-13
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Updated
2026-11-13
Description by
Score
N/A
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Name of the Vulnerable Software and Affected Versions
TightVNC viewer (affected versions not specified)
UltraVNC viewer (affected versions not specified)
Description
A heap-based buffer overflow exists in the Tight JPEG decoding process. This occurs because the width of the framebuffer rectangle, which is controlled by the server, is not validated against a fixed-size decoding buffer. A malicious VNC server can trigger an out-of-bounds heap write when a user connects, leading to an application crash or other memory-corruption impacts.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
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