CVE-2025-27726 Path traversal in HGW-BL1500HM
Attackers on the local network can read or modify files via path traversal in the USB file-sharing feature of the HGW-BL1500HM router.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-27726?
CVE-2025-27726 is a low-severity path traversal vulnerability in KDDI CORPORATION HGW-BL1500HM, published on 28 Mar 2025. It can only be exploited from the same machine or local 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 download 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 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-2025-27726?
How do I fix CVE-2025-27726?
No fix has been published for CVE-2025-27726 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-2025-27726 being exploited?
There is no known exploitation of CVE-2025-27726 in the wild and no public exploit code.
Sources
Also known as GHSA-5xpq-j82h-xf63.