CVE-2025-9527 Linksys E1700 QoSSetup stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the QoSSetup function of Linksys E1700 routers, potentially leading to arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-9527?
CVE-2025-9527 is a high-severity memory corruption vulnerability in Linksys E1700, published on 27 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in Linksys E1700 1.0.0.4.003. This affects the function QoSSetup of the file /goform/QoSSetup. Performing manipulation of the argument ack_policy results in stack-based buffer overflow. The attack may be initiated remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2025-9527?
It affects 1 product.
Products include Linksys E1700 Firmware.
How do I fix CVE-2025-9527?
No fix has been published for CVE-2025-9527 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-2025-9527 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9527 exists.
Other vulnerabilities in Linksys E1700
Sources
Also known as GHSA-wmmv-mw2h-x89h.