What is CVE-2025-50398?

CVE-2025-50398 is a critical-severity vulnerability in Mercurycom D196g, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2025-12-16.

How severe is CVE-2025-50398?

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

Buffer overflow in Mercurycom D196g

CVE-2025-50398

Mercury D196G d196gv1-cn-up_2020-01-09_11.21.44 is vulnerable to Buffer Overflow in the function sub_404CAEDC via the parameter fac_password.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (29.5th 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

Mercurycom D196g
Mercurycom D196g_firmware
N/a — versions n/a

Weakness classification (CWE)

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

References

cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-50398?: CVE-2025-50398 is a critical-severity vulnerability in Mercurycom D196g, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2025-12-16.
How severe is CVE-2025-50398?: Critical severity. CVSS v3 base score is 9.8 out of 10.