CVE-2025-54792 LocalSend is Vulnerable to Man-in-the-Middle Attacks, Leading to File Interception
An attacker on the local network can intercept and modify file transfers via a Man-in-the-Middle vulnerability in the discovery protocol.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-54792?
CVE-2025-54792 is a critical vulnerability in localsend, published on 1 Aug 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
LocalSend is an open-source app to securely share files and messages with nearby devices over local networks without needing an internet connection. In versions 1.16.1 and below, a critical Man-in-the-Middle (MitM) vulnerability in the software's discovery protocol allows an unauthenticated attacker on the same local network to impersonate legitimate devices, silently intercepting, reading, and modifying any file transfer. This can be used to steal sensitive data or inject malware, like ransomware, into files shared between trusted users. The attack is hardly detectable and easy to implement, posing a severe and immediate security risk. This issue was fixed in version 1.17.0.
Which versions are affected by CVE-2025-54792?
It affects 1 product.
Products include Localsend Localsend.
How do I fix CVE-2025-54792?
No fix has been published for CVE-2025-54792 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-54792 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-54792 exists.
Other vulnerabilities in localsend
Sources
Also known as GHSA-424h-5f6m-x63f.