CVE-2026-12218: Stack-based Buffer Overflow in Yealink SIP-T46U
A vulnerability was detected in Yealink SIP-T46U 108.87.50.1. The affected element is the function StartReportInformation of the file /api/inner/beforewifitest of the component Web FastCGI Service. The manipulation of the argument port results in stack-based buffer overflow. Access to the local network is required for this attack. The exploit is now public and may be used. The vendor was contacted early about this disclosure and is working on a patch to fix it.
AI Analysis
Technical Summary
This vulnerability affects Yealink SIP-T46U version 108.87.50.1. It arises from improper handling of the port argument in the StartReportInformation function within the /api/inner/beforewifitest endpoint of the Web FastCGI Service, leading to a stack-based buffer overflow. An attacker with local network access can exploit this flaw to potentially execute arbitrary code or cause a denial of service. The vendor is aware and developing a fix, but no patch is currently available.
Potential Impact
Successful exploitation can lead to arbitrary code execution or denial of service on the affected device. The attack requires local network access and low privileges but no user interaction. The vulnerability has a high CVSS 4.0 score of 8.6, reflecting significant impact on confidentiality, integrity, and availability.
Mitigation Recommendations
No official patch or fix is currently available. The vendor is working on a patch. Until a fix is released, restrict local network access to the affected device to trusted users only. Monitor vendor advisories for updates and apply the patch promptly once available.
CVE-2026-12218: Stack-based Buffer Overflow in Yealink SIP-T46U
Description
A vulnerability was detected in Yealink SIP-T46U 108.87.50.1. The affected element is the function StartReportInformation of the file /api/inner/beforewifitest of the component Web FastCGI Service. The manipulation of the argument port results in stack-based buffer overflow. Access to the local network is required for this attack. The exploit is now public and may be used. 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
This vulnerability affects Yealink SIP-T46U version 108.87.50.1. It arises from improper handling of the port argument in the StartReportInformation function within the /api/inner/beforewifitest endpoint of the Web FastCGI Service, leading to a stack-based buffer overflow. An attacker with local network access can exploit this flaw to potentially execute arbitrary code or cause a denial of service. The vendor is aware and developing a fix, but no patch is currently available.
Potential Impact
Successful exploitation can lead to arbitrary code execution or denial of service on the affected device. The attack requires local network access and low privileges but no user interaction. The vulnerability has a high CVSS 4.0 score of 8.6, reflecting significant impact on confidentiality, integrity, and availability.
Mitigation Recommendations
No official patch or fix is currently available. The vendor is working on a patch. Until a fix is released, restrict local network access to the affected device to trusted users only. Monitor vendor advisories for updates and apply the patch promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-06-14T13:54:11.247Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2f96421cccde5f260cd674
Added to database: 06/15/2026, 06:05:54 UTC
Last enriched: 06/27/2026, 20:58:18 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 84
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