CVE-2025-27718 Path traversal in HGW-BL1500HM
Attackers on the LAN can exploit path traversal in USB file sharing to read, modify files, or execute arbitrary code on the HGW-BL1500HM router.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-27718?
CVE-2025-27718 is a high-severity path traversal vulnerability in KDDI CORPORATION HGW-BL1500HM, published on 28 Mar 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2025-27718?
How do I fix CVE-2025-27718?
No fix has been published for CVE-2025-27718 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-27718 being exploited?
There is no known exploitation of CVE-2025-27718 in the wild and no public exploit code.
Sources
Also known as GHSA-32p9-v6w3-v6fj.