#VU105869 Path traversal in HGW-BL1500HM - CVE-2025-27932

Vulnerability identifier: #VU105869

Vulnerability risk: Medium

CVSSv4.0: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-27932

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
HGW-BL1500HM
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: KDDI CORPORATION

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in the file deletion process of the USB storage file-sharing function. A remote user can send a specially crafted HTTP request and delete arbitrary files on the system, leading to denial of service (DoS) condition.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

HGW-BL1500HM: 002.002.003

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External links
https://jvn.jp/en/jp/JVN04278547/index.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.