CVE-2026-122116 PUBLISHED

Assigner: mitre
Reserved: 04.11.2026 Published: 04.11.2026 Updated: 04.11.2026

Certain Yealink terminal devices before 2026-04-21 contain an improper access control vulnerability in the Wi-Fi 802.1X PEAP network configuration function. This flaw exposes deployed 802.1X network access authentication credentials to unauthorized users. The latest Yealink firmware has addressed this vulnerability by restricting 802.1X configuration modification privileges to administrator accounts only by default.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS Score: 4.3

Product Status

Vendor Yealink
Product T3XW Series Phones
Versions Default: unaffected
  • affected from 124.85.0.1 to 124.87.0.22 (excl.)
Vendor Yealink
Product T4X Series Phones
Versions Default: unaffected
  • affected from 108.85.0.1 to 108.87.0.23 (excl.)
Vendor Yealink
Product T5X Series Phones
Versions Default: unaffected
  • affected from 96.85.0.1 to 96.87.0.24 (excl.)
Vendor Yealink
Product T7X Series Phones
Versions Default: unaffected
  • affected from 185.87.0.5 to 185.87.0.39 (excl.)
Vendor Yealink
Product SIP-T85W、SIP-T87W
Versions Default: unaffected
  • affected from 185.87.0.5 to 185.87.0.39 (excl.)
Vendor Yealink
Product AX83H、AX86R
Versions Default: unaffected
  • affected from 180.86.0.1 to 180.87.0.15 (excl.)
Vendor Yealink
Product CP925
Versions Default: unaffected
  • affected from 148.85.0.1 to 148.87.0.41 (excl.)
Vendor Yealink
Product CP935W
Versions Default: unaffected
  • affected from 149.85.0.1 to 149.87.0.41 (excl.)
Vendor Yealink
Product MP E2 Teams Series
Versions Default: unaffected
  • affected from 176.15.0.1 to 176.15.0.191 (excl.)
Vendor Yealink
Product VP59 Teams
Versions Default: unaffected
  • affected from 91.15.0.1 to 91.15.1.37 (excl.)
Vendor Yealink
Product SIP-T58W
Versions Default: unaffected
  • affected from 150.86.0.5 to 150.87.0.22 (excl.)
Vendor Yealink
Product VP59
Versions Default: unaffected
  • affected from 91.86.0.5 to 91.87.0.27 (excl.)
Vendor Yealink
Product CP965
Versions Default: unaffected
  • affected from 143.86.0.5 to 143.87.0.27 (excl.)

Solutions

We recommend that when enabling Wi-Fi 802.1X, you can restrict the access types of web users by updating security.web_limited_access_level via Auto Provision; for example: security.web_limited_access_level=user. Alternatively, refer to the Admin Guide to configure Wi-Fi permissions for the user account: network-wifi = 2, wifi = 2.

Regarding this vulnerability, newer firmware versions of the device have, by default, restricted 802.1X-related function permissions to administrator-only.

References

Problem Types

  • CWE-863 Incorrect Authorization CWE