PT-2026-49181 · Yealink · Sip-T46U

Cookedmelon · Published 2026-06-15 · Updated 2026-06-15 · CVE-2026-12220

NVD

CVSS v2.0

7.7

High

Base vector

AV:A/AC:L/Au:S/C:C/I:C/A:C

A vulnerability has been found in Yealink SIP-T46U 108.86.0.118. This affects the function mod upgrade.SparePartsUpload of the file /api/upgrade/accupgradebychunk of the component Firmware Chunk Upload handler. Such manipulation of the argument uid leads to stack-based buffer overflow. The attack can only be initiated within the local network. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Exploit

Fix

Buffer Overflow

Stack Overflow

Weakness Enumeration

CWE-119

CWE-121

Related Identifiers

CVE-2026-12220

Affected Products

Sip-T46U

References · 6

• 🔥 http://cdn2.v50to.cc/T46U/T46U_mod_upgrade_SparePartsUpload_stack_overflow.zip · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-12220 · Security Note
• https://vuldb.com/vuln/370863 · Note
• https://vuldb.com/vuln/370863/cti · Note
• https://vuldb.com/cve/CVE-2026-12220 · Note
• https://vuldb.com/submit/834205 · Note