What is CVE-2025-20634?

CVE-2025-20634 is a critical-severity vulnerability in Mediatek Mt2737, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2025-02-03.

How severe is CVE-2025-20634?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Mediatek Mt2737

CVE-2025-20634

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote code execution, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges ne…

Vulnerability class: Buffer Overflow

EPSS: 0.007 (48.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mediatek Mt2737
Mediatek Mt6813
Mediatek Mt6835
Mediatek Mt6835t
Mediatek Mt6878
Mediatek Mt6878m
Mediatek Mt6879
Mediatek Mt6886
Mediatek Mt6895
Mediatek Mt6895tt

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

security@mediatek.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-20634?: CVE-2025-20634 is a critical-severity vulnerability in Mediatek Mt2737, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2025-02-03.
How severe is CVE-2025-20634?: Critical severity. CVSS v3 base score is 9.8 out of 10.