CVE-2026-12221 | BDVDB-2026-340262 Detail

Description#

A vulnerability was found in Yealink SIP-T46U 108.86.0.118. This impacts the function sprintf of the file /api/upgrade/upgrade of the component Firmware Chunk Upload Handler. Performing a manipulation of the argument uid/start_offset results in stack-based buffer overflow. The attack needs to be approached within the local network. The exploit has been made public and could be used. The vendor was contacted early about this disclosure and is working on a patch to fix it.

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Exploit#

History#

1. Version 12026-06-15Record published in the CVE List.
2. Version 22026-06-27Most recent update recorded in the CVE List.