CVE-2026-128321 | Glavsoft TightVNC/UltraVNC JPEG decoding heap-based overflow

November 13, 2026 Yanac

A vulnerability has been found in Glavsoft TightVNC and UltraVNC and classified as critical. This vulnerability affects unknown code of the component JPEG decoding. Performing a manipulation results in heap-based buffer overflow.

This vulnerability was named CVE-2026-128321. The attack may be initiated remotely. There is no available exploit.VulDB Recent EntriesRead More