CVE-2025-9356 Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 inboundFilterAdd stack-based overflow

High 8.7 Published 22 Aug 2025 Updated 26 Aug 2025

Remote attackers can trigger a stack-based buffer overflow in Linksys range extenders via the inboundFilterAdd function, potentially leading to code execution or service disruption.

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-2025-9356?

CVE-2025-9356 is a high-severity memory corruption vulnerability in Linksys Re6250 Firmware, published on 22 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was determined in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. Affected by this issue is the function inboundFilterAdd of the file /goform/inboundFilterAdd. Executing manipulation of the argument ruleName can lead to stack-based buffer overflow. The attack may be performed from a remote location. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-121, CWE-119

Which versions are affected by CVE-2025-9356?

It affects 6 products.

Products include Linksys Re6250 Firmware, Linksys Re6300 Firmware, Linksys Re6350 Firmware, Linksys Re6500 Firmware, Linksys Re7000 Firmware, Linksys Re9000 Firmware.

How do I fix CVE-2025-9356?

No fix has been published for CVE-2025-9356 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-2025-9356 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9356 exists.

All Linksys Re6250 Firmware vulnerabilities

Sources

Also known as GHSA-vwr6-xxvv-9fw9.