What is CVE-2026-12220?

CVE-2026-12220 is a high-severity vulnerability, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.0/10. Published 2026-06-15.

How severe is CVE-2026-12220?

High severity. CVSS v3 base score is 8.0 out of 10.

CVE-2026-12220

CVE-2026-12220

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 arg…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-121 — Stack-based Buffer Overflow

References

cna@vuldb.com
cna@vuldb.com
cna@vuldb.com
cna@vuldb.com
cna@vuldb.com

Frequently asked questions

What is CVE-2026-12220?: CVE-2026-12220 is a high-severity vulnerability, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.0/10. Published 2026-06-15.
How severe is CVE-2026-12220?: High severity. CVSS v3 base score is 8.0 out of 10.