CVE-2025-9247 Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 setVlan stack-based overflow

High 8.7 Published 20 Aug 2025 Updated 21 Aug 2025

Remote attackers can trigger a stack-based buffer overflow in the setVlan function of Linksys range extenders, 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-2025-9247?

CVE-2025-9247 is a high-severity memory corruption vulnerability in Linksys Re6250 Firmware, published on 20 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability has been found 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. The affected element is the function setVlan of the file /goform/setVlan. The manipulation of the argument vlan_set leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. 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-2025-9247?

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-2025-9247?

No fix has been published for CVE-2025-9247 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-2025-9247 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9247 exists.

All Linksys Re6250 Firmware vulnerabilities

Sources

Also known as GHSA-mmmq-mqf5-pgj3.