# Yealink SIP-T46U vulnerabilities

Source: https://junglewise.ai/threats/technologies/sip-t46u  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/sip-t46u.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 6 vulnerabilities in Yealink SIP-T46U: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-12223, was published on 15 June 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 6 (0 critical, 0 exploited in the wild)

## About Yealink SIP-T46U

Firmware for the Yealink SIP-T46U IP phone, providing the operating environment and communication protocols for the hardware.

## Latest Yealink SIP-T46U vulnerabilities

- [CVE-2026-12223: Yealink SIP-T46U command injection in Web FastCGI Service](https://junglewise.ai/threats/cve-2026-12223-yealink-sip-t46u-command-injection-in-web-fastcgi-service) (medium, CVSS 5.5, published 15 Jun 2026)
- [CVE-2026-12222: Yealink SIP-T46U stack buffer overflow in Web FastCGI Service](https://junglewise.ai/threats/cve-2026-12222-yealink-sip-t46u-stack-buffer-overflow-in-web-fastcgi-service) (high, CVSS 8, published 15 Jun 2026)
- [CVE-2026-12221: Yealink SIP-T46U stack-based buffer overflow in Firmware Chunk Upload Handler](https://junglewise.ai/threats/cve-2026-12221-yealink-sip-t46u-stack-based-buffer-overflow-in-firmware-chunk) (high, CVSS 8, published 15 Jun 2026)
- [CVE-2026-12220: Yealink SIP-T46U stack overflow in Firmware Chunk Upload handler](https://junglewise.ai/threats/cve-2026-12220-yealink-sip-t46u-stack-overflow-in-firmware-chunk-upload-handler) (high, CVSS 8, published 15 Jun 2026)
- [CVE-2026-12219: Yealink SIP-T46U command injection in Web FastCGI Service](https://junglewise.ai/threats/cve-2026-12219-yealink-sip-t46u-command-injection-in-web-fastcgi-service) (medium, CVSS 6.3, published 15 Jun 2026)
- [CVE-2026-12218: Yealink SIP-T46U stack-based buffer overflow in Web FastCGI Service](https://junglewise.ai/threats/cve-2026-12218-yealink-sip-t46u-stack-based-buffer-overflow-in-web-fastcgi) (high, CVSS 8, published 15 Jun 2026)

## Most severe Yealink SIP-T46U vulnerabilities

- [CVE-2026-12222: Yealink SIP-T46U stack buffer overflow in Web FastCGI Service](https://junglewise.ai/threats/cve-2026-12222-yealink-sip-t46u-stack-buffer-overflow-in-web-fastcgi-service) (high, CVSS 8, published 15 Jun 2026)
- [CVE-2026-12221: Yealink SIP-T46U stack-based buffer overflow in Firmware Chunk Upload Handler](https://junglewise.ai/threats/cve-2026-12221-yealink-sip-t46u-stack-based-buffer-overflow-in-firmware-chunk) (high, CVSS 8, published 15 Jun 2026)
- [CVE-2026-12220: Yealink SIP-T46U stack overflow in Firmware Chunk Upload handler](https://junglewise.ai/threats/cve-2026-12220-yealink-sip-t46u-stack-overflow-in-firmware-chunk-upload-handler) (high, CVSS 8, published 15 Jun 2026)
- [CVE-2026-12218: Yealink SIP-T46U stack-based buffer overflow in Web FastCGI Service](https://junglewise.ai/threats/cve-2026-12218-yealink-sip-t46u-stack-based-buffer-overflow-in-web-fastcgi) (high, CVSS 8, published 15 Jun 2026)
- [CVE-2026-12219: Yealink SIP-T46U command injection in Web FastCGI Service](https://junglewise.ai/threats/cve-2026-12219-yealink-sip-t46u-command-injection-in-web-fastcgi-service) (medium, CVSS 6.3, published 15 Jun 2026)
- [CVE-2026-12223: Yealink SIP-T46U command injection in Web FastCGI Service](https://junglewise.ai/threats/cve-2026-12223-yealink-sip-t46u-command-injection-in-web-fastcgi-service) (medium, CVSS 5.5, published 15 Jun 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Yealink SIP-T46U vulnerabilities", https://junglewise.ai/threats/technologies/sip-t46u, 9 November 2026.