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CVE-2026-12220

HIGH
8.0
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-12220
State
PUBLISHED
Assigner
VulDB
Reserved
2026-06-14 13:54 UTC
Published
2026-06-15 04:45 UTC
Last updated
2026-06-15 04:45 UTC
Primary CWE
CWE-121
Stack-based Buffer Overflow
Vendor / Product
Yealink / SIP-T46U
Sources
cve.org  ·  NVD

Severity & Metrics

8.0 HIGH CVSS 3.1
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Affected products (1)
VendorProductPlatformVersions
Yealink SIP-T46U — 108.86.0.118
Weakness (CWE)
CWESourceDescription
CWE-119 cna Memory Corruption
CWE-121 cna Stack-based Buffer Overflow
CVSS scores (4)
ScoreSeverityVersionSourceVector
8.6 HIGH 4.0 cna CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
8.0 HIGH 3.1 cna CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
8.0 HIGH 3.0 cna CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
7.7 N/D 2.0 cna AV:A/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
References (5)
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