CVE-2025-8821
Published: 11 August 2025
Summary
CVE-2025-8821 is a low-severity Command Injection (CWE-77) vulnerability in Linksys Re6250 Firmware. Its CVSS base score is 2.1 (Low).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 11.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-6 (Least Privilege) and SI-10 (Information Input Validation).
Deeper analysis
A vulnerability has been identified in multiple Linksys wireless range extender models including the RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000 up to firmware version 20250801. The flaw resides in the RP_setBasic function within the /goform/RP_setBasic endpoint, where improper handling of the bssid parameter permits operating system command injection. The issue is tracked under CWE-77 and CWE-78 and carries a CVSS 4.0 score of 2.1.
An authenticated remote attacker can supply a crafted bssid value to execute arbitrary commands on the affected device. Public proof-of-concept code demonstrating the injection has been released, and the vendor was notified prior to disclosure but provided no response.
The associated EPSS score remains flat at 0.0415 with no observed increase following publication, indicating limited exploitation interest to date.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-24101
Vulnerability details
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…
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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.
- CWE(s)
Related Threats
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).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation and sanitization of the bssid input parameter to block OS command injection in RP_setBasic.
Limits privileges of authenticated users so that even successful injection via the web endpoint yields minimal system impact.
Enforces strict access control decisions on the /goform/RP_setBasic endpoint to restrict which users can supply the bssid argument.