What is CVE-2025-20727?

CVE-2025-20727 is a high-severity vulnerability in Mediatek Lr12a, classified under Out-of-bounds Write. CVSS score: 8.1/10. Published 2025-11-04.

How severe is CVE-2025-20727?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Mediatek Lr12a

CVE-2025-20727

In Modem, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution priv…

Vulnerability class: Buffer Overflow

EPSS: 0.005 (38.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mediatek Lr12a
Mediatek Mt2735
Mediatek Mt2737
Mediatek Mt6739
Mediatek Mt6761
Mediatek Mt6762
Mediatek Mt6762d
Mediatek Mt6762m
Mediatek Mt6763
Mediatek Mt6765

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

security@mediatek.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-20727?: CVE-2025-20727 is a high-severity vulnerability in Mediatek Lr12a, classified under Out-of-bounds Write. CVSS score: 8.1/10. Published 2025-11-04.
How severe is CVE-2025-20727?: High severity. CVSS v3 base score is 8.1 out of 10.