CVE-2025-9146 Linksys E5600 Firmware checkFw.sh verify_gemtek_header risky encryption
Attackers can exploit weak cryptographic algorithms in the firmware verification process to bypass security checks on Linksys E5600 routers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-9146?
CVE-2025-9146 is a high-severity vulnerability in Linksys E5600, published on 19 Aug 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A flaw has been found in Linksys E5600 1.1.0.26. The affected element is the function verify_gemtek_header of the file checkFw.sh of the component Firmware Handler. Executing manipulation can lead to risky cryptographic algorithm. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is described as difficult. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2025-9146?
It affects 1 product.
Products include Linksys E5600 Firmware.
How do I fix CVE-2025-9146?
No fix has been published for CVE-2025-9146 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-9146 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9146 exists.
Other vulnerabilities in Linksys E5600
Sources
Also known as GHSA-9j2h-mcj7-4233.