Stack-based Buffer Overflow in Yealink SIP-T46U Web FastCGI Service BlueToothTest
CVE-2026-12222 affects Yealink SIP-T46U firmware version 108.86.0.118. The vulnerability is in the Web FastCGI Service, specifically the mod_webd.BlueToothTest function exposed via the /api/inner/bttest endpoint. A crafted manipulation of the btMac, pin, or reserved argument can trigger a stack-based buffer overflow, indicating insufficient bounds checking on attacker-controlled input before copying it into a stack buffer. The issue is reachable over the device web interface from within the local network. Public disclosure indicates exploit details are available.
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Exploits
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No public exploit code observed for this vulnerability.
Recent activity
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No news coverage yet. Advisories and community discussion only.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.