CVE-2025-9481 Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 setIpv6 stack-based overflow

High 8.7 Published 26 Aug 2025 Updated 26 Aug 2025

Remote attackers can execute arbitrary code via a stack-based buffer overflow in the setIpv6 function of Linksys range extenders.

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-2025-9481?

CVE-2025-9481 is a high-severity memory corruption vulnerability in Linksys Re6250 Firmware, published on 26 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 setIpv6 of the file /goform/setIpv6. The manipulation of the argument tunrd_Prefix leads to stack-based buffer overflow. Remote exploitation of the attack is possible. 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-2025-9481?

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-2025-9481?

No fix has been published for CVE-2025-9481 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-2025-9481 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9481 exists.

All Linksys Re6250 Firmware vulnerabilities

Sources

Also known as GHSA-p4rf-jrjg-fmrh.