# MediaTek MT6877 Modem vulnerabilities

Source: https://junglewise.ai/threats/technologies/mt6877-modem  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/mt6877-modem.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in MediaTek MT6877 Modem: 0 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-20539, was published on 5 October 2026. Nothing in the last four weeks, down from 3 vulnerabilities in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 3
- All time: 3 (0 critical, 0 exploited in the wild)

## About MediaTek MT6877 Modem

MediaTek MT6877 is a modem component for mobile devices that handles cellular network communications.

## Latest MediaTek MT6877 Modem vulnerabilities

- [CVE-2026-20539: MediaTek Modem out of bounds read due to missing bounds check](https://junglewise.ai/threats/cve-2026-20539-in-modem-there-is-a-possible-out-of-bounds-read-due-to-a-missing) (medium, CVSS 5.3, published 5 Oct 2026)
- [CVE-2026-20526: MediaTek Modem out-of-bounds write](https://junglewise.ai/threats/cve-2026-20526-in-modem-there-is-a-possible-out-of-bounds-write-due-to-a-missing) (high, CVSS 7.5, published 5 Oct 2026)
- [CVE-2026-20519: MediaTek Modem out-of-bounds write](https://junglewise.ai/threats/cve-2026-20519-in-modem-there-is-a-possible-out-of-bounds-write-due-to-a-missing) (high, CVSS 7.5, published 5 Oct 2026)

## Most severe MediaTek MT6877 Modem vulnerabilities

- [CVE-2026-20526: MediaTek Modem out-of-bounds write](https://junglewise.ai/threats/cve-2026-20526-in-modem-there-is-a-possible-out-of-bounds-write-due-to-a-missing) (high, CVSS 7.5, published 5 Oct 2026)
- [CVE-2026-20519: MediaTek Modem out-of-bounds write](https://junglewise.ai/threats/cve-2026-20519-in-modem-there-is-a-possible-out-of-bounds-write-due-to-a-missing) (high, CVSS 7.5, published 5 Oct 2026)
- [CVE-2026-20539: MediaTek Modem out of bounds read due to missing bounds check](https://junglewise.ai/threats/cve-2026-20539-in-modem-there-is-a-possible-out-of-bounds-read-due-to-a-missing) (medium, CVSS 5.3, published 5 Oct 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 3 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 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 3 | 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 MT6877 Modem vulnerabilities", https://junglewise.ai/threats/technologies/mt6877-modem, 9 November 2026.