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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 but did not respond in any way.

PUBLISHED Reserved 2026-06-14 | Published 2026-06-15 | Updated 2026-06-15 | Assigner VulDB




HIGH: 8.6CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
HIGH: 8.0CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
HIGH: 8.0CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
7.7AV:A/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

Stack-based Buffer Overflow

Memory Corruption

Product status

108.87.50.1
affected

Timeline

2026-06-14:Advisory disclosed
2026-06-14:VulDB entry created
2026-06-14:VulDB entry last update

Credits

CookedMelon (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/370861 (VDB-370861 | Yealink SIP-T46U Web FastCGI Service beforewifitest StartReportInformation stack-based overflow) vdb-entry technical-description

vuldb.com/vuln/370861/cti (VDB-370861 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/cve/CVE-2026-12218 (CVE-2026-12218 | CVE Analysis and Report) third-party-advisory

vuldb.com/submit/834193 (Submit #834193 | yealink T46U 108.87.50.1 stack) third-party-advisory

cdn2.v50to.cc/T46U/T46U_beforewifitest_stack_overflow.zip broken-link exploit

cve.org (CVE-2026-12218)

nvd.nist.gov (CVE-2026-12218)

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