Description
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.
Published: 2026-11-04
Score: 4.3 Medium
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

Vendor Solution

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.

Tracking

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Advisories

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History

Fri, 06 Nov 2026 12:15:00 +0000

Type Values Removed Values Added
Title Yealink Wi‑Fi 802.1X Credential Leakage via Improper Access Control Yealink: Yealink: Information disclosure via improper access control in Wi-Fi 802.1X configuration
Weaknesses CWE-266
References
Metrics threat_severity

None

threat_severity

Moderate


Wed, 04 Nov 2026 21:00:00 +0000

Type Values Removed Values Added
Title Yealink Wi‑Fi 802.1X Credential Leakage via Improper Access Control

Wed, 04 Nov 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 04 Nov 2026 18:00:00 +0000

Type Values Removed Values Added
Description 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.
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'}


Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-11-04T20:00:57.668Z

Reserved: 2026-11-04T17:47:03.995Z

Link: CVE-2026-122116

cve-icon Vulnrichment

Updated: 2026-11-04T19:59:20.848Z

cve-icon NVD

Status : Received

Published: 2026-11-04T18:17:43.473

Modified: 2026-11-04T20:19:11.870

Link: CVE-2026-122116

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-11-04T17:47:04Z

Links: CVE-2026-122116 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-11-06T15:15:05Z

Weaknesses
  • CWE-266

    Incorrect Privilege Assignment

  • CWE-863

    Incorrect Authorization