CVE-2025-8821
Published: 11 August 2025
Summary
CVE-2025-8821 is a medium-severity Command Injection (CWE-77) vulnerability in Linksys Re6250 Firmware. Its CVSS base score is 6.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 25.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
OS command injection in public web endpoint (/goform/RP_setBasic) directly enables remote exploitation of the application (T1190) and arbitrary Unix shell command execution (T1059.004).
NVD 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…
more
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.
Deeper analysisAI
CVE-2025-8821 is an OS command injection vulnerability affecting Linksys Wi-Fi range extenders, specifically the models RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000 running firmware versions up to 20250801. The issue resides in the RP_setBasic function within the /goform/RP_setBasic endpoint, where manipulation of the bssid argument enables arbitrary command execution. It is classified under CWE-77 (Command Injection) and CWE-78 (OS Command Injection), with a CVSS v3.1 base score of 6.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).
The vulnerability can be exploited remotely by an attacker with low privileges, such as an authenticated user on the device. Successful exploitation allows injection of operating system commands, potentially resulting in limited impacts to confidentiality, integrity, and availability, including unauthorized data access, modification, or denial of service on the affected extender.
Advisories from VulDB detail the vulnerability (CTI ID 319355) and note public disclosure of an exploit proof-of-concept on GitHub, including a specific POC section. No patches or vendor responses are available, as the manufacturer was contacted early but did not reply.
The exploit has been publicly disclosed, increasing the risk of active exploitation against unpatched devices.
Details
- CWE(s)