# CVE-2026-122116: Yealink terminal devices improper access control in Wi-Fi 802.1X PEAP

Source: https://junglewise.ai/threats/cve-2026-122116-certain-yealink-terminal-devices-before-2026-04-21-contain-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-04. Updated: 2026-11-04  
License: CC BY 4.0 with a link back

CVE-2026-122116 · Severity: medium · CVSS 4.3 · Published 2026-11-04

Yealink IP phones and conference devices contain a vulnerability that allows unauthorized users to view and modify Wi-Fi 802.1X PEAP network authentication credentials. An attacker with physical or local access could extract these credentials and use them to compromise the corporate network's wireless authentication system. The vendor has patched the issue by restricting configuration changes to administrator accounts only.

Vendors: [Yealink](https://junglewise.ai/threats/vendors/yealink).

## Quick answers

**Is CVE-2026-122116 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-122116 being exploited in the wild.

**How severe is CVE-2026-122116?** Medium severity, with a CVSS score of 4.3, published 4 November 2026.

**Which products and versions are affected?** Yealink IP phones and terminal devices before 2026-04-21.

**Is there a fix for CVE-2026-122116?** Yes: fixed in Firmware released 2026-04-21 and later. Until then: Restrict physical access to Yealink terminal devices and limit device management interface access to authorized personnel only. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-122116 attacked?** It is attacked with local access or from the adjacent network, in a network appliance.

**Am I affected by CVE-2026-122116?** Check whether you run Yealink IP phones and terminal devices at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in Firmware released 2026-04-21 and later

Restrict physical access to Yealink terminal devices and limit device management interface access to authorized personnel only.

## Technical details

An improper access control flaw in the Wi-Fi 802.1X PEAP configuration function of Yealink terminal devices fails to enforce privilege restrictions on credential modification. This allows any local user with device access to view and modify 802.1X authentication credentials used for network access. The vulnerability requires local access to the device's configuration interface; patches restrict such operations to administrator-level accounts.

## Affected products

- Yealink IP phones and terminal devices before 2026-04-21

## Timeline

- 2026-11-04: advisory

## References

- [https://www.yealink.com/en/trust-center/security-bulletins/wifi-8021x-peap-authentication-credential-leakage-vulnerability](https://www.yealink.com/en/trust-center/security-bulletins/wifi-8021x-peap-authentication-credential-leakage-vulnerability)