The MediaTek Product Security Bulletin contains details of security vulnerabilities affecting certain MediaTek chipsets. Device OEMs have been notified of all the issues and the corresponding security patches for at least two months before publication. We take the security of our chipsets and our customers' products very seriously. At this time, we are not aware of any active exploitation of these vulnerabilities in the wild.
The severity of the identified vulnerabilities was conducted based on the Common Vulnerability Scoring System version 3.1 (CVSS v3.1).
The severity of the identified vulnerabilities was conducted based on the Common Vulnerability Scoring System version 3.1 (CVSS v3.1).
Summary
Details
| CVE | CVE-2026-20423 |
|---|---|
| Subcomponent | wlan |
| Severity | High |
| CWE | CWE-749 Exposed Dangerous Method or Function |
| Description | There is a possible out of bounds write due to a missing bounds check. |
| Affected Chipsets | MT7902, MT7920, MT7921, MT7922, MT7925, MT7927 |
| Report Source | External |
| CVE | CVE-2026-20425 |
|---|---|
| Subcomponent | display |
| Severity | High |
| CWE | CWE-787 Out-of-bounds Write |
| Description | There is a possible out of bounds write due to a missing bounds check. |
| Affected Chipsets | MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8196, MT8678, MT8793 |
| Report Source | External |
| CVE | CVE-2026-20426 |
|---|---|
| Subcomponent | display |
| Severity | High |
| CWE | CWE-787 Out-of-bounds Write |
| Description | There is a possible out of bounds write due to a missing bounds check. |
| Affected Chipsets | MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8196, MT8678, MT8793 |
| Report Source | External |
| CVE | CVE-2026-20427 |
|---|---|
| Subcomponent | display |
| Severity | High |
| CWE | CWE-787 Out-of-bounds Write |
| Description | There is a possible escalation of privilege due to a missing bounds check. |
| Affected Chipsets | MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8196, MT8678, MT8793 |
| Report Source | External |
| CVE | CVE-2026-20428 |
|---|---|
| Subcomponent | display |
| Severity | High |
| CWE | CWE-787 Out-of-bounds Write |
| Description | There is a possible out of bounds write due to a missing bounds check. |
| Affected Chipsets | MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8196, MT8678, MT8793 |
| Report Source | External |
| CVE | CVE-2026-20430 |
|---|---|
| Subcomponent | wlan |
| Severity | High |
| CWE | CWE-787 Out-of-bounds Write |
| Description | There is a possible out of bounds write due to an incorrect bounds check. |
| Affected Chipsets | MT6890, MT7915, MT7916, MT7981, MT7986 |
| Report Source | Internal |
| CVE | CVE-2026-20434 |
|---|---|
| Subcomponent | Modem |
| Severity | High |
| CWE | CWE-787 Out-of-bounds Write |
| Description | There is a possible out of bounds write due to a missing bounds check. |
| Affected Chipsets | MT2735, MT2737, MT6739, MT6761, MT6762, MT6762D, MT6762M, MT6763, MT6765, MT6765T, MT6767, MT6768, MT6769, MT6769K, MT6769S, MT6769T, MT6769Z, MT6771, MT6779, MT6781, MT6783, MT6785, MT6785T, MT6785U, MT6789, MT6833, MT6833P, MT6835, MT6835T, MT6853, MT6853T, MT6855, MT6855T, MT6873, MT6875, MT6875T, MT6877, MT6877T, MT6877TT, MT6878, MT6878M, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6895TT, MT6896, MT6897, MT6899, MT6980, MT6980D, MT6983, MT6983T, MT6985, MT6985T, MT6989, MT6989T, MT6990, MT6991, MT8666, MT8667, MT8668, MT8673, MT8675, MT8676, MT8678, MT8755, MT8765, MT8766, MT8766R, MT8768, MT8771, MT8781, MT8786, MT8788, MT8788E, MT8789, MT8791, MT8791T, MT8792, MT8793, MT8795T, MT8797, MT8798, MT8863, MT8873, MT8883, MT8893 |
| Report Source | Internal |
| CVE | CVE-2026-20435 |
|---|---|
| Subcomponent | preloader |
| Severity | Medium |
| CWE | CWE-522 Insufficiently Protected Credentials |
| Description | There is a possible read of device unique identifiers due to a logic error. |
| Affected Chipsets | MT2737, MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6813, MT6833, MT6853, MT6855, MT6877, MT6878, MT6879, MT6880, MT6885, MT6886, MT6890, MT6893, MT6895, MT6897, MT6983, MT6985, MT6989, MT6990, MT6993, MT8169, MT8186, MT8188, MT8370, MT8390, MT8676, MT8678, MT8696, MT8793 |
| Report Source | External |
| CVE | CVE-2026-20436 |
|---|---|
| Subcomponent | wlan |
| Severity | Medium |
| CWE | CWE-120 Classic Buffer Overflow |
| Description | There is a possible escalation of privilege due to a missing bounds check. |
| Affected Chipsets | MT7902, MT7920, MT7921, MT7922, MT7925, MT7927, MT8696 |
| Report Source | External |
| CVE | CVE-2026-20437 |
|---|---|
| Subcomponent | MAE |
| Severity | Medium |
| CWE | CWE-416 Use After Free |
| Description | There is a possible system crash due to use after free. |
| Affected Chipsets | MT2718, MT6899, MT6991, MT8678, MT8793 |
| Report Source | External |
| CVE | CVE-2026-20438 |
|---|---|
| Subcomponent | MAE |
| Severity | Medium |
| CWE | CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition |
| Description | There is a possible out of bounds write due to a race condition. |
| Affected Chipsets | MT2718, MT6899, MT6991, MT8168, MT8169, MT8186, MT8188, MT8678, MT8695, MT8696, MT8793 |
| Report Source | External |
| CVE | CVE-2026-20439 |
|---|---|
| Subcomponent | imgsys |
| Severity | Medium |
| CWE | CWE-416 Use After Free |
| Description | There is a possible system crash due to use after free. |
| Affected Chipsets | MT2718, MT6899, MT6991, MT8678, MT8793 |
| Report Source | External |
| CVE | CVE-2026-20440 |
|---|---|
| Subcomponent | MAE |
| Severity | Medium |
| CWE | CWE-1285 Specified Index, Position, or Offset |
| Description | There is a possible out of bounds write due to a missing bounds check. |
| Affected Chipsets | MT2718, MT6899, MT6991, MT8678, MT8793 |
| Report Source | External |
| CVE | CVE-2026-20441 |
|---|---|
| Subcomponent | MAE |
| Severity | Medium |
| CWE | CWE-787 Out-of-bounds Write |
| Description | There is a possible out of bounds write due to a missing bounds check. |
| Affected Chipsets | MT2718, MT6899, MT6991, MT8678, MT8793 |
| Report Source | External |
| CVE | CVE-2026-20442 |
|---|---|
| Subcomponent | display |
| Severity | Medium |
| CWE | CWE-416 Use After Free |
| Description | There is a possible system crash due to use after free. |
| Affected Chipsets | MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8186, MT8188, MT8196, MT8667, MT8673, MT8676, MT8678, MT8765, MT8766, MT8768, MT8771, MT8781, MT8791T, MT8792, MT8793, MT8795T, MT8796, MT8798, MT8873, MT8883 |
| Report Source | External |
| CVE | CVE-2026-20443 |
|---|---|
| Subcomponent | display |
| Severity | Medium |
| CWE | CWE-416 Use After Free |
| Description | There is a possible memory corruption due to use after free. |
| Affected Chipsets | MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8186, MT8188, MT8196, MT8667, MT8673, MT8676, MT8678, MT8765, MT8766, MT8768, MT8771, MT8781, MT8791T, MT8792, MT8793, MT8795T, MT8796, MT8798, MT8873, MT8883 |
| Report Source | External |
| CVE | CVE-2026-20444 |
|---|---|
| Subcomponent | display |
| Severity | Medium |
| CWE | CWE-787 Out-of-bounds Write |
| Description | There is a possible memory corruption due to a missing bounds check. |
| Affected Chipsets | MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8186, MT8188, MT8196, MT8667, MT8673, MT8676, MT8678, MT8765, MT8766, MT8768, MT8771, MT8781, MT8791T, MT8792, MT8793, MT8795T, MT8796, MT8798, MT8873, MT8883 |
| Report Source | External |
| CVE | CVE-2026-20424 |
|---|---|
| Subcomponent | display |
| Severity | Medium |
| CWE | CWE-125 Out-of-bounds Read |
| Description | There is a possible out of bounds read due to a missing bounds check. |
| Affected Chipsets | MT6991, MT6993, MT8196, MT8678, MT8793 |
| Report Source | External |
| CVE | CVE-2026-20429 |
|---|---|
| Subcomponent | display |
| Severity | Medium |
| CWE | CWE-125 Out-of-bounds Read |
| Description | There is a possible out of bounds read due to a missing bounds check. |
| Affected Chipsets | MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8196, MT8678, MT8793 |
| Report Source | External |
| CVE | CVE-2026-20445 |
|---|---|
| Subcomponent | MDDP |
| Severity | Medium |
| CWE | CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition |
| Description | There is a possible system crash due to a race condition. |
| Affected Chipsets | MT6835, MT6855, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8188, MT8678, MT8755, MT8771, MT8797, MT8798 |
| Report Source | External |
| CVE | CVE-2026-20416 |
|---|---|
| Subcomponent | pcie |
| Severity | Medium |
| CWE | CWE-787 Out-of-bounds Write |
| Description | There is a possible out of bounds write due to a missing bounds check. |
| Affected Chipsets | MT6991, MT6993, MT8188, MT8678 |
| Report Source | External |
Versions
| Version | Date | Description |
| 1.0 | March 2, 2026 | Bulletin published. |
Notes
Information above is generated only at the time of creation of this Security Bulletin. The list of affected chipsets could be not complete. For any further information, device OEMs can reach your MediaTek contact person if needed.
If you want to report a security vulnerability in MediaTek chipsets or products, please go to Report Security Vulnerability page on MediaTek website.
If you want to report a security vulnerability in MediaTek chipsets or products, please go to Report Security Vulnerability page on MediaTek website.