CVE-2025-50401
CWE-120Published: December 16, 2025· Updated: Jun 17, 2026
Official Description
Mercury D196G d196gv1-cn-up_2020-01-09_11.21.44 is vulnerable to Buffer Overflow in the function sub_404CAEDC via the parameter password.
Risk Analysis
The Mercury D196G firmware contains a buffer overflow vulnerability triggered by the password parameter. This critical flaw allows remote attackers to potentially execute arbitrary code or cause a system crash, warranting immediate attention due to the high CVSS score.
No public exploit is currently known, and the vulnerability is not in the CISA KEV catalog. It is remotely exploitable with low complexity.
Apply available firmware updates provided by the manufacturer to resolve the buffer overflow issue.
Technical Analysis
CVE-2025-50401 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (2)
Quick Facts
Related CVEs (CWE-120)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2025-50401 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts