CVE-2026-12222: Stack-based Buffer Overflow in Yealink SIP-T46U
A vulnerability was determined in Yealink SIP-T46U 108.86.0.118. Affected is the function mod_webd.BlueToothTest of the file /api/inner/bttest of the component Web FastCGI Service. Executing a manipulation of the argument btMac/pin/reserved can lead to stack-based buffer overflow. The attack needs to be done within the local network. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure and is working on a patch to fix it.
AI Analysis
Technical Summary
CVE-2026-12222 is a stack-based buffer overflow vulnerability affecting Yealink SIP-T46U version 108.86.0.118. It occurs in the mod_webd.BlueToothTest function within the Web FastCGI Service component, accessible via the /api/inner/bttest endpoint. Manipulating the btMac, pin, or reserved arguments can cause a stack overflow. Exploitation requires local network access. The vulnerability has been publicly disclosed, but no patch or official remediation is currently available from the vendor.
Potential Impact
Successful exploitation of this vulnerability could lead to a stack-based buffer overflow, potentially allowing an attacker with local network access to execute arbitrary code or cause a denial of service on the affected device. The CVSS 4.0 score of 8.6 indicates high severity with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
As of now, no official patch or remediation is available. The vendor has been notified and is working on a fix. Until a patch is released, restrict access to the device's local network to trusted users only to reduce the risk of exploitation.
CVE-2026-12222: Stack-based Buffer Overflow in Yealink SIP-T46U
Description
A vulnerability was determined in Yealink SIP-T46U 108.86.0.118. Affected is the function mod_webd.BlueToothTest of the file /api/inner/bttest of the component Web FastCGI Service. Executing a manipulation of the argument btMac/pin/reserved can lead to stack-based buffer overflow. The attack needs to be done within the local network. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure and is working on a patch to fix it.
CVSS v4.0
Score 8.6high
Affected software
cpe:2.3:a:yealink:sip-t46u:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12222 is a stack-based buffer overflow vulnerability affecting Yealink SIP-T46U version 108.86.0.118. It occurs in the mod_webd.BlueToothTest function within the Web FastCGI Service component, accessible via the /api/inner/bttest endpoint. Manipulating the btMac, pin, or reserved arguments can cause a stack overflow. Exploitation requires local network access. The vulnerability has been publicly disclosed, but no patch or official remediation is currently available from the vendor.
Potential Impact
Successful exploitation of this vulnerability could lead to a stack-based buffer overflow, potentially allowing an attacker with local network access to execute arbitrary code or cause a denial of service on the affected device. The CVSS 4.0 score of 8.6 indicates high severity with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
As of now, no official patch or remediation is available. The vendor has been notified and is working on a fix. Until a patch is released, restrict access to the device's local network to trusted users only to reduce the risk of exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-06-14T13:54:21.407Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2f96421cccde5f260cd690
Added to database: 06/15/2026, 06:05:54 UTC
Last enriched: 06/27/2026, 20:58:31 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 221
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