CVE-2025-8820
BaseFortify
Publication date: 2025-08-11
Last updated on: 2025-09-04
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linksys | re6250_firmware | 1.0.04.001 |
| linksys | re6250 | * |
| linksys | re6300_firmware | 1.2.07.001 |
| linksys | re6300 | * |
| linksys | re6350_firmware | 1.0.04.001 |
| linksys | re6350 | * |
| linksys | re7000_firmware | 1.1.05.003 |
| linksys | re7000 | * |
| linksys | re9000_firmware | 1.0.04.002 |
| linksys | re9000 | * |
| linksys | re6500_firmware | 1.0.013.001 |
| linksys | re6500 | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-119 | The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
| CWE-121 | A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2025-8820 is a critical stack-based buffer overflow vulnerability in multiple Linksys wireless range extenders (RE6250, RE6300, RE6350, RE6500, RE7000, RE9000) up to firmware version 20250801. It occurs in the wirelessBasic function at the /goform/wirelessBasic endpoint, where the submit_SSID1 argument can be manipulated with crafted input to overflow a stack buffer. This flaw allows remote attackers to potentially execute arbitrary code or cause denial of service without authentication. [1, 2]
How can this vulnerability impact me? :
This vulnerability can impact you by allowing remote attackers to crash your router or execute arbitrary code on it, compromising the confidentiality, integrity, and availability of the device. This could lead to loss of wireless functionality, unauthorized control over the device, and disruption of network services. Since the exploit is publicly available and requires no authentication, the risk is high. [1, 2]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by monitoring for unusual or malformed HTTP requests targeting the /goform/wirelessBasic endpoint, specifically those manipulating the submit_SSID1 parameter with excessively long or crafted input. Network intrusion detection systems (NIDS) can be configured to alert on such suspicious requests. Additionally, checking device logs for crashes or unexpected reboots of the wireless extender may indicate exploitation attempts. However, no specific detection commands or signatures are provided in the available resources. [1, 2]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include replacing affected Linksys devices (RE6250, RE6300, RE6350, RE6500, RE7000, RE9000 up to firmware 20250801) with alternatives, as no patches or vendor mitigations are currently available. Additionally, restricting remote access to the vulnerable devices, disabling wireless functionality if possible, and monitoring network traffic for exploitation attempts can help reduce risk. [1]