Path Traversal in Kddi Corporation Hgw-Bl1500hm

CVE-2025-27718

Improper limitation of a pathname to a restricted directory ('Path Traversal') issue exists in the file upload process of the USB storage file-sharing function of HGW-BL1500HM Ver 002.002.003 and earlier. If this vulnerability is exploited, the product's files may be obtained and/or altered or arbitrary code may be executed by a crafted HTTP request to specific functions of the product from a device connected to the LAN side.

Vulnerability class: Path Traversal (Directory Traversal)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-27718: held from 0.009 to 0.010.

EPSS over last 30 days · oldest: 0.009 · newest: 0.010 · change: +0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-27718?
CVE-2025-27718 is a high-severity vulnerability in Kddi Corporation Hgw-Bl1500hm, classified under Path Traversal. CVSS score: 8.8/10. Published 2025-03-28.
How severe is CVE-2025-27718?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2025-27718 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.