CVE-2025-49809 Command injection in mtr
Attackers can execute arbitrary commands with elevated privileges by manipulating the MTR_PACKET environment variable in privileged contexts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-49809?
CVE-2025-49809 is a high-severity command injection vulnerability in mtr, published on 4 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
mtr through 0.95, in certain privileged contexts, mishandles execution of a program specified by the MTR_PACKET environment variable. NOTE: mtr on macOS may often have Sudo rules, as an indirect consequence of Homebrew not installing setuid binaries.
Weakness: CWE-829
Which versions are affected by CVE-2025-49809?
How do I fix CVE-2025-49809?
Apply the vendor's patch.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2025-49809 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-49809 exists.
Sources
Also known as AZL-65136, AZL-65232, DEBIAN-CVE-2025-49809, GHSA-hvvx-vw37-6fjm, MINI-q244-fvfc-2v3c, UBUNTU-CVE-2025-49809.