Out-of-Bounds Write Vulnerability in Mediatek Modem
CVE-2025-20726

7.5HIGH

Key Information:

Vendor

MediaTek
Status
Mt2735, Mt2737, Mt6739, Mt6761, Mt6762, Mt6762d, Mt6762m, Mt6763, Mt6765, Mt6765t, Mt6767, Mt6768, Mt6769, Mt6769k, Mt6769s, Mt6769t, Mt6769z, Mt6771, Mt6813, 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, Mt8673, Mt8675, Mt8676, Mt8678, Mt8765, Mt8766, Mt8766r, Mt8768, Mt8771, Mt8786, Mt8788, Mt8788e, Mt8791, Mt8791t, Mt8792, Mt8793, Mt8795t, Mt8797, Mt8798, Mt8863, Mt8873, Mt8883, Mt8893
Vendor
CVE Published:
4 November 2025

What is CVE-2025-20726?

In Mediatek's Modem, a critical security flaw allows for an out-of-bounds write due to inadequate bounds checking. This vulnerability poses a risk of remote privilege escalation, particularly in scenarios where a user equipment (UE) connects to a malicious base station operated by an attacker. The exploitation of this vulnerability does not require user interaction, making it a significant concern for affected systems. A patch has been released to address this issue, and users are advised to update their systems promptly to mitigate the risks.

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

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

MT2735, MT2737, MT6739, MT6761, MT6762, MT6762D, MT6762M, MT6763, MT6765, MT6765T, MT6767, MT6768, MT6769, MT6769K, MT6769S, MT6769T, MT6769Z, MT6771, MT6813, 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, MT8673, MT8675, MT8676, MT8678, MT8765, MT8766, MT8766R, MT8768, MT8771, MT8786, MT8788, MT8788E, MT8791, MT8791T, MT8792, MT8793, MT8795T, MT8797, MT8798, MT8863, MT8873, MT8883, MT8893 Modem LR12A, NR15, NR16, NR17, NR17R

References

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

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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