CVE-2026-12218

HIGH 8.0

Yealink SIP-T46U Web FastCGI Service beforewifitest StartReportInformation stack-based overflow

CVSS Score

8.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121 CWE-119
Vendor	yealink
Product	sip-t46u
Published	Jun 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Yealink / SIP-T46U

108.87.50.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/370861 vuldb.com: https://vuldb.com/vuln/370861/cti vuldb.com: https://vuldb.com/cve/CVE-2026-12218 vuldb.com: https://vuldb.com/submit/834193 cdn2.v50to.cc: http://cdn2.v50to.cc/T46U/T46U_beforewifitest_stack_overflow.zip

Credits

🔍 CookedMelon (VulDB User) VulDB CNA Team