Denial of Service Vulnerability in Mediatek Modem Devices
CVE-2026-20422

7.5HIGH

Key Information:

Vendor

MediaTek
Status
Mt2735, Mt2737, Mt6813, Mt6815, Mt6833, Mt6835, Mt6853, Mt6855, Mt6858, Mt6873, Mt6875, Mt6877, Mt6878, Mt6879, Mt6880, Mt6883, Mt6885, Mt6886, Mt6889, Mt6890, Mt6891, Mt6893, Mt6895, Mt6896, Mt6897, Mt6899, Mt6980, Mt6983, Mt6985, Mt6986, Mt6989, Mt6990, Mt6991, Mt6993, Mt8668, Mt8673, Mt8675, Mt8676, Mt8678, Mt8755, Mt8771, Mt8775, Mt8791, Mt8791t, Mt8792, Mt8793, Mt8795t, Mt8797, Mt8798, Mt8863, Mt8873, Mt8883, Mt8893
Vendor
CVE Published:
2 February 2026

What is CVE-2026-20422?

A vulnerability in Mediatek's modem devices allows for a potential system crash due to improper input validation. Attackers can exploit this vulnerability to trigger a remote denial of service when a user equipment (UE) connects to a malicious base station controlled by the attacker. The exploitation does not require any additional execution privileges or user interaction, making it particularly concerning for users relying on these devices. A patch (ID: MOLY00827332) has been issued to address this issue.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

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Deploy the Patch

Affected Version(s)

MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896, MT6897, MT6899, MT6980, MT6983, MT6985, MT6986, MT6989, MT6990, MT6991, MT6993, MT8668, MT8673, MT8675, MT8676, MT8678, MT8755, MT8771, MT8775, MT8791, MT8791T, MT8792, MT8793, MT8795T, MT8797, MT8798, MT8863, MT8873, MT8883, MT8893 Modem NR15, NR16, NR17, and NR17R

References

https://corp.mediatek.com/product-security-bulletin/Febru...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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