CVE•Published 2026-06-15•Modified 2026-07-24•1 article on news•5 live references•NVD data
CVE-2026-12221
Vulnerability data via NVD (ingested)
CVSS v3.1
8.0
HIGH
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
30
Exploit Prediction Scoring System · top 70% of all CVEs
Weaknesses (CWE)
Description
A vulnerability was found in Yealink SIP-T46U 108.86.0.118. This impacts the function sprintf of the file /api/upgrade/upgrade of the component Firmware Chunk Upload Handler. Performing a manipulation of the argument uid/start_offset results in stack-based buffer overflow. The attack needs to be approached within the local network. The exploit has been made public and could be used. The vendor was contacted early about this disclosure and is working on a patch to fix it.
Timeline
Published 2026-06-15
Modified 2026-07-24
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-12221Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-12221Censys host search filtered to this CVE id.
grep.app
CVE-2026-12221Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-12221GitHub code search for direct mentions.
Google dork
"CVE-2026-12221" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (2)
CVE-2026-122212 repos
Xuchen-Li/cv-arxiv-dailyPython
Automatically update arXiv papers about SOT & VLT, Multi-modal Learning, LLM and Video Understanding using Github Actions.
jaschadub/compromised-packages-checkPython
Scan a repository for known-malicious npm, cratres, and PyPI package versions from recent supply-chain compromises (Mini Shai-Hulud, TanStack, @cap-js/mbt, etc). UPDATED 6 TIMES A …