CVE-2026-12220

8.0 HIGH

A vulnerability has been found in Yealink SIP-T46U 108.86.0.118

Published: 2026-06-15 · Last updated: 2026-06-15

Severity and scoring

CVSS: 8.0 HIGH
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-119, CWE-121

Description

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-12220
[Other]http://cdn2.v50to.cc/T46U/T46U_mod_upgrade_SparePartsUpload_stack_overflow.zip
[Other]https://vuldb.com/cve/CVE-2026-12220
[Other]https://vuldb.com/submit/834205
[Other]https://vuldb.com/vuln/370863
[Other]https://vuldb.com/vuln/370863/cti

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CVE-2026-12222 — A vulnerability was determined in Yealink SIP-T46U 108.86.0.118 (8.0 HIGH)
CVE-2026-12221 — A vulnerability was found in Yealink SIP-T46U 108.86.0.118 (8.0 HIGH)