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...
Description
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.
Classification
CVE ID: CVE-2025-27718
CVSS Base Severity: HIGH
CVSS Base Score: 8.8
CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
Vendor: KDDI CORPORATION
Product: HGW-BL1500HM
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.5% (probability of being exploited)
EPSS Percentile: 64.82% (scored less or equal to compared to others)
EPSS Date: 2025-04-25 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-27718https://kddi-tech.com/contents/appendix_L2_06.html#64433e4a-8946-9c06-bddf-91cbfe56c8e5
https://jvn.jp/en/jp/JVN04278547/