CVE-2025-9392 Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 qosClassifier stack-based overflow

High 8.7 Published 24 Aug 2025 Updated 25 Aug 2025

Remote attackers can trigger a stack-based buffer overflow in the qosClassifier function of Linksys range extenders, potentially executing arbitrary code.

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-2025-9392?

CVE-2025-9392 is a high-severity memory corruption vulnerability in Linksys Re6250 Firmware, published on 24 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A security vulnerability has been detected 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. This affects the function qosClassifier of the file /goform/qosClassifier. Such manipulation of the argument dir/sFromPort/sToPort/dFromPort/dToPort/protocol/layer7/dscp/remark_dscp leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed publicly 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-2025-9392?

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-2025-9392?

No fix has been published for CVE-2025-9392 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-2025-9392 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9392 exists.

All Linksys Re6250 Firmware vulnerabilities

Sources

Also known as GHSA-pv94-f92x-7373.