# MediaTek MT6858 vulnerabilities

Source: https://junglewise.ai/threats/technologies/mt6858  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/mt6858.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 16 vulnerabilities in MediaTek MT6858: 0 in the last 7 days and 13 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-20579, was published on 5 October 2026. Nothing in the last four weeks, down from 8 vulnerabilities in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 13
- All time: 16 (0 critical, 0 exploited in the wild)

## About MediaTek MT6858

The MediaTek MT6858 is a system-on-a-chip designed for mobile devices and wireless connectivity.

## Latest MediaTek MT6858 vulnerabilities

- [CVE-2026-20579: MediaTek vdec out-of-bounds write in type confusion](https://junglewise.ai/threats/cve-2026-20579-in-vdec-there-is-a-possible-out-of-bounds-write-due-to-type) (medium, CVSS 6.7, published 5 Oct 2026)
- [CVE-2026-20544: MediaTek out of bounds write in modem](https://junglewise.ai/threats/cve-2026-20544-in-meta-there-is-a-possible-out-of-bounds-write-due-to-a-missing) (medium, CVSS 6.8, published 5 Oct 2026)
- [CVE-2026-20543: MediaTek Modem information disclosure due to logic error](https://junglewise.ai/threats/cve-2026-20543-in-modem-there-is-a-possible-information-disclosure-due-to-a) (medium, CVSS 5.5, published 5 Oct 2026)
- [CVE-2026-20538: MediaTek Modem out-of-bounds read due to missing permission check](https://junglewise.ai/threats/cve-2026-20538-in-modem-there-is-a-possible-out-of-bounds-read-due-to-a-missing) (medium, CVSS 5.3, published 5 Oct 2026)
- [CVE-2026-20534: MediaTek Modem out of bounds read](https://junglewise.ai/threats/cve-2026-20534-in-modem-there-is-a-possible-out-of-bounds-read-due-to-an) (medium, CVSS 5.3, published 5 Oct 2026)
- [CVE-2026-20531: MediaTek APU memory corruption use-after-free](https://junglewise.ai/threats/cve-2026-20531-in-apu-there-is-a-possible-memory-corruption-due-to-use-after) (high, CVSS 8.4, published 5 Oct 2026)
- [CVE-2026-20523: MediaTek neuropilot out-of-bounds write privilege escalation](https://junglewise.ai/threats/cve-2026-20523-in-neuropilot-there-is-a-possible-out-of-bounds-write-due-to-a) (high, CVSS 8.4, published 5 Oct 2026)
- [CVE-2026-20520: MediaTek Modem out of bounds write in Modem](https://junglewise.ai/threats/cve-2026-20520-in-modem-there-is-a-possible-out-of-bounds-write-due-to-a-missing) (high, CVSS 7.5, published 5 Oct 2026)
- [CVE-2026-20515: MediaTek GPU use after free leading to system crash](https://junglewise.ai/threats/cve-2026-20515-mediatek-gpu-use-after-free-leading-to-system-crash) (medium, CVSS 5.5, published 7 Sep 2026)
- [CVE-2026-20503: MediaTek Modem system crash due to missing bounds check](https://junglewise.ai/threats/cve-2026-20503-mediatek-modem-system-crash-due-to-missing-bounds-check) (medium, CVSS 5.3, published 7 Sep 2026)
- [CVE-2026-20502: MediaTek vdec out of bounds write](https://junglewise.ai/threats/cve-2026-20502-mediatek-vdec-out-of-bounds-write) (high, CVSS 8.4, published 7 Sep 2026)
- [CVE-2026-20501: MediaTek vdec heap buffer overflow privilege escalation](https://junglewise.ai/threats/cve-2026-20501-mediatek-vdec-heap-buffer-overflow-privilege-escalation) (high, CVSS 8.4, published 7 Sep 2026)
- [CVE-2026-20500: MediaTek Modem system crash due to improper input validation](https://junglewise.ai/threats/cve-2026-20500-mediatek-modem-system-crash-due-to-improper-input-validation) (medium, CVSS 5.5, published 7 Sep 2026)
- [CVE-2026-20461: MediaTek Modem out-of-bounds write via rogue base station](https://junglewise.ai/threats/cve-2026-20461-mediatek-modem-out-of-bounds-write-via-rogue-base-station) (info, published 1 Jul 2026)
- [CVE-2026-20450: In Modem, there is a possible system crash due to incorrect error handling. This could lead to remote denial of…](https://junglewise.ai/threats/cve-2026-20450-in-modem-there-is-a-possible-system-crash-due-to-incorrect-error) (medium, CVSS 6.5, published 4 May 2026)
- [CVE-2026-20449: In Modem, there is a possible system crash due to a heap buffer overflow. This could lead to remote denial of service…](https://junglewise.ai/threats/cve-2026-20449-in-modem-there-is-a-possible-system-crash-due-to-a-heap-buffer) (medium, CVSS 6.5, published 4 May 2026)

## Most severe MediaTek MT6858 vulnerabilities

- [CVE-2026-20523: MediaTek neuropilot out-of-bounds write privilege escalation](https://junglewise.ai/threats/cve-2026-20523-in-neuropilot-there-is-a-possible-out-of-bounds-write-due-to-a) (high, CVSS 8.4, published 5 Oct 2026)
- [CVE-2026-20502: MediaTek vdec out of bounds write](https://junglewise.ai/threats/cve-2026-20502-mediatek-vdec-out-of-bounds-write) (high, CVSS 8.4, published 7 Sep 2026)
- [CVE-2026-20501: MediaTek vdec heap buffer overflow privilege escalation](https://junglewise.ai/threats/cve-2026-20501-mediatek-vdec-heap-buffer-overflow-privilege-escalation) (high, CVSS 8.4, published 7 Sep 2026)
- [CVE-2026-20531: MediaTek APU memory corruption use-after-free](https://junglewise.ai/threats/cve-2026-20531-in-apu-there-is-a-possible-memory-corruption-due-to-use-after) (high, CVSS 8.4, published 5 Oct 2026)
- [CVE-2026-20520: MediaTek Modem out of bounds write in Modem](https://junglewise.ai/threats/cve-2026-20520-in-modem-there-is-a-possible-out-of-bounds-write-due-to-a-missing) (high, CVSS 7.5, published 5 Oct 2026)
- [CVE-2026-20544: MediaTek out of bounds write in modem](https://junglewise.ai/threats/cve-2026-20544-in-meta-there-is-a-possible-out-of-bounds-write-due-to-a-missing) (medium, CVSS 6.8, published 5 Oct 2026)
- [CVE-2026-20579: MediaTek vdec out-of-bounds write in type confusion](https://junglewise.ai/threats/cve-2026-20579-in-vdec-there-is-a-possible-out-of-bounds-write-due-to-type) (medium, CVSS 6.7, published 5 Oct 2026)
- [CVE-2026-20450: In Modem, there is a possible system crash due to incorrect error handling. This could lead to remote denial of…](https://junglewise.ai/threats/cve-2026-20450-in-modem-there-is-a-possible-system-crash-due-to-incorrect-error) (medium, CVSS 6.5, published 4 May 2026)
- [CVE-2026-20449: In Modem, there is a possible system crash due to a heap buffer overflow. This could lead to remote denial of service…](https://junglewise.ai/threats/cve-2026-20449-in-modem-there-is-a-possible-system-crash-due-to-a-heap-buffer) (medium, CVSS 6.5, published 4 May 2026)
- [CVE-2026-20543: MediaTek Modem information disclosure due to logic error](https://junglewise.ai/threats/cve-2026-20543-in-modem-there-is-a-possible-information-disclosure-due-to-a) (medium, CVSS 5.5, published 5 Oct 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 8 vulnerabilities in the four before.

| 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 | 5 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 8 | 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 |

## Other MediaTek technologies

- [MediaTek MT6890](https://junglewise.ai/threats/technologies/mt6890): 43 vulnerabilities
- [MediaTek MT6991](https://junglewise.ai/threats/technologies/mt6991): 41 vulnerabilities
- [MediaTek Modem](https://junglewise.ai/threats/technologies/modem): 31 vulnerabilities
- [MediaTek MT6877](https://junglewise.ai/threats/technologies/mt6877): 31 vulnerabilities
- [MediaTek MT6835](https://junglewise.ai/threats/technologies/mt6835): 30 vulnerabilities
- [MediaTek MT6878](https://junglewise.ai/threats/technologies/mt6878): 30 vulnerabilities
- [MediaTek MT6833](https://junglewise.ai/threats/technologies/mt6833): 29 vulnerabilities
- [MediaTek MT6853](https://junglewise.ai/threats/technologies/mt6853): 29 vulnerabilities
- [MediaTek MT6893](https://junglewise.ai/threats/technologies/mt6893): 29 vulnerabilities
- [MediaTek MT6899](https://junglewise.ai/threats/technologies/mt6899): 29 vulnerabilities
- [MediaTek MT8678](https://junglewise.ai/threats/technologies/mt8678): 29 vulnerabilities
- [MediaTek MT2735](https://junglewise.ai/threats/technologies/mt2735): 28 vulnerabilities

## 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, "MediaTek MT6858 vulnerabilities", https://junglewise.ai/threats/technologies/mt6858, 9 November 2026.