CVE-2026-12220

HIGH EPSS 28.9%
Published Jun 15, 20262w ago · Modified Jun 17, 20261w ago
7.3 CVSS 4.0
High
Find Similar
Published Jun 15, 2026 2w ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.3
Exploitability
—
Impact
—
Vector string
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Adjacent
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
28.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Memory Safety
CWE-121

References 5

  • cdn2.v50to.cc http://cdn2.v50to.cc/T46U/T46U_mod_upgrade_SparePartsUpload_stack_overflow.zip
  • vuldb.com https://vuldb.com/cve/CVE-2026-12220
  • vuldb.com https://vuldb.com/submit/834205
  • vuldb.com https://vuldb.com/vuln/370863
  • vuldb.com https://vuldb.com/vuln/370863/cti

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.