CVE-2025-40634 Stack-based buffer overflow in TP-Link Archer AX50
A stack-based buffer overflow in the conn-indicator binary allows remote attackers to execute arbitrary code on TP-Link Archer AX50 routers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-40634?
CVE-2025-40634 is a critical memory corruption vulnerability in TP-Link Link Archer AX50, published on 20 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Stack-based buffer overflow vulnerability in the 'conn-indicator' binary running as root on the TP-Link Archer AX50 router, in firmware versions prior to 1.0.15 build 241203 rel61480. This vulnerability allows an attacker to execute arbitrary code on the device over LAN and WAN networks.
Weakness: CWE-121
Which versions are affected by CVE-2025-40634?
How do I fix CVE-2025-40634?
No fix has been published for CVE-2025-40634 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-40634 being exploited?
There is no known exploitation of CVE-2025-40634 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-h754-2839-mqvq.