What is CVE-2025-27071?

CVE-2025-27071 is a high-severity vulnerability in Qualcomm Fastconnect 6800, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.3/10. Published 2025-08-06.

How severe is CVE-2025-27071?

High severity. CVSS v3 base score is 7.3 out of 10.

Buffer overflow in Qualcomm Fastconnect 6800

CVE-2025-27071

Memory corruption while processing specific files in Powerline Communication Firmware.

Vulnerability class: Buffer Overflow

EPSS: 0.002 (8.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Qualcomm Fastconnect_6800
Qualcomm Fastconnect_6800_firmware
Qualcomm Fastconnect_6900
Qualcomm Fastconnect_6900_firmware
Qualcomm Fastconnect_7800
Qualcomm Fastconnect_7800_firmware
Qualcomm Qca6391
Qualcomm Qca6391_firmware
Qualcomm Qca6426
Qualcomm Qca6426_firmware

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

product-security@qualcomm.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-27071?: CVE-2025-27071 is a high-severity vulnerability in Qualcomm Fastconnect 6800, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.3/10. Published 2025-08-06.
How severe is CVE-2025-27071?: High severity. CVSS v3 base score is 7.3 out of 10.