Technology · MediaTek
MediaTek Mt6991 Firmware vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 20 vulnerabilities in MediaTek Mt6991 Firmware: 0 in the last 7 days and 4 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-20503, was published on 7 September 2026. Nothing was published in the last eight weeks.
- Last 7 days
- 0
- Last 90 days
- 4
- Critical, all time
- 0
- Exploited in the wild
- 0
About MediaTek Mt6991 Firmware
MediaTek MT6991 is a processor firmware for mobile devices.
Latest MediaTek Mt6991 Firmware vulnerabilities
- CVE-2026-20503: MediaTek Modem system crash due to missing bounds checkmediumCVSS 5.3EPSS 0.2%
- CVE-2026-20502: MediaTek vdec out of bounds writehighCVSS 8.4EPSS 0.1%
- CVE-2026-20501: MediaTek vdec heap buffer overflow privilege escalationhighCVSS 8.4EPSS 0.1%
- CVE-2026-20500: MediaTek Modem system crash due to improper input validationmediumCVSS 5.5EPSS 0.1%
- CVE-2026-20498: In geniezone, there is a possible escalation of privilege due to a missing permission check. This could lead to local…mediumCVSS 6EPSS 0.2%
- CVE-2026-20489: MediaTek display integer overflow information disclosuremediumCVSS 4.4EPSS 0.2%
- CVE-2026-20488: MediaTek display information disclosure via missing bounds checkmediumCVSS 4.4EPSS 0.2%
- CVE-2026-20486: MediaTek imgsensor application crash due to incorrect error handlingmediumCVSS 6.7EPSS 0.2%
- CVE-2026-20484: MediaTek TFA information disclosure due to missing permission checkmediumCVSS 4.4EPSS 0.2%
- CVE-2026-20483: MediaTek Telephony permission check bypasshighCVSS 7.7EPSS 0.2%
- CVE-2026-20477: MediaTek display out-of-bounds writemediumCVSS 6EPSS 0.2%
- CVE-2026-20475: MediaTek display out-of-bounds write privilege escalationmediumCVSS 6EPSS 0.2%
- CVE-2026-20474: MediaTek display driver privilege escalation via race conditionmediumCVSS 6EPSS 0.1%
- CVE-2026-20473: MediaTek display memory corruption use-after-freemediumCVSS 6EPSS 0.2%
- CVE-2026-20451: In slbc, there is a possible out of bounds write due to type confusion. This could lead to local escalation of…mediumCVSS 6.7EPSS 0.1%
- CVE-2026-20450: In Modem, there is a possible system crash due to incorrect error handling. This could lead to remote denial of…mediumCVSS 6.5EPSS 0.3%
- 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…mediumCVSS 6.5EPSS 0.2%
- CVE-2026-20448: In geniezone, there is a possible escalation of privilege due to a missing permission check. This could lead to local…mediumCVSS 6.7EPSS 0.1%
- CVE-2026-20447: In geniezone, there is a possible escalation of privilege due to a missing bounds check. This could lead to local…mediumCVSS 6.7EPSS 0.1%
- CVE-2026-20433: In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation…highCVSS 8.8EPSS 0.3%
Most severe MediaTek Mt6991 Firmware vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-20433: In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation…highCVSS 8.8EPSS 0.3%
- CVE-2026-20502: MediaTek vdec out of bounds writehighCVSS 8.4EPSS 0.1%
- CVE-2026-20501: MediaTek vdec heap buffer overflow privilege escalationhighCVSS 8.4EPSS 0.1%
- CVE-2026-20483: MediaTek Telephony permission check bypasshighCVSS 7.7EPSS 0.2%
- CVE-2026-20486: MediaTek imgsensor application crash due to incorrect error handlingmediumCVSS 6.7EPSS 0.2%
- CVE-2026-20451: In slbc, there is a possible out of bounds write due to type confusion. This could lead to local escalation of…mediumCVSS 6.7EPSS 0.1%
- CVE-2026-20448: In geniezone, there is a possible escalation of privilege due to a missing permission check. This could lead to local…mediumCVSS 6.7EPSS 0.1%
- CVE-2026-20447: In geniezone, there is a possible escalation of privilege due to a missing bounds check. This could lead to local…mediumCVSS 6.7EPSS 0.1%
- CVE-2026-20450: In Modem, there is a possible system crash due to incorrect error handling. This could lead to remote denial of…mediumCVSS 6.5EPSS 0.3%
- 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…mediumCVSS 6.5EPSS 0.2%
Vulnerabilities per week
Nothing was published in the last eight weeks. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 4 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
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[](https://junglewise.ai/threats/technologies/mt6991-firmware)<a href="https://junglewise.ai/threats/technologies/mt6991-firmware"><img src="https://junglewise.ai/threats/technologies/mt6991-firmware/badge.svg" alt="MediaTek Mt6991 Firmware vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/mt6991-firmware.json, and this page as text at https://junglewise.ai/threats/technologies/mt6991-firmware.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "MediaTek Mt6991 Firmware vulnerabilities", https://junglewise.ai/threats/technologies/mt6991-firmware, 9 November 2026.