CVE-2025-8821 Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 RP_setBasic os command injection

Medium 5.3 Published 11 Aug 2025 Updated 12 Aug 2025

Remote attackers can execute arbitrary OS commands via the bssid argument in RP_setBasic on Linksys range extenders, posing a critical security risk.

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-2025-8821?

CVE-2025-8821 is a medium-severity command injection vulnerability in Linksys Re6250 Firmware, published on 11 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was identified in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 up to 20250801. This issue affects the function RP_setBasic of the file /goform/RP_setBasic. The manipulation of the argument bssid leads to os command injection. The attack may be initiated 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-78, CWE-77

Which versions are affected by CVE-2025-8821?

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-2025-8821?

No fix has been published for CVE-2025-8821 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2025-8821 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-8821 exists.

All Linksys Re6250 Firmware vulnerabilities

Sources

Also known as GHSA-8fxj-p7cc-6q3h.