{"id":65128,"date":"2025-08-29T03:51:49","date_gmt":"2025-08-29T03:51:49","guid":{"rendered":""},"modified":"2025-09-27T02:05:16","modified_gmt":"2025-09-27T08:05:16","slug":"cve-2025-9246-critical-buffer-overflow-vulnerability-in-linksys-routers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-9246-critical-buffer-overflow-vulnerability-in-linksys-routers\/","title":{"rendered":"CVE-2025-9246: Critical Buffer Overflow Vulnerability in Linksys Routers<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

CVE-2025-9246 is a critical vulnerability found in several models of Linksys wireless range extenders. This flaw exposes the devices to the risk of a stack-based buffer overflow attack, which can be executed remotely. The affected devices include Linksys models RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000. This vulnerability is of significant importance because of the potential for system compromise<\/a> and data leakage. The vendor, Linksys, has been contacted about the issue but has yet to respond or provide a patch.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-9246
\nSeverity: Critical (CVSS 8.8)
\nAttack Vector: Remote
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system compromise or data<\/a> leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Linksys RE6250 | 1.0.013.001\/1.0.04.001\/1.0.04.002\/1.1.05.003\/1.2.07.001
\nLinksys RE6300 | 1.0.013.001\/1.0.04.001\/1.0.04.002\/1.1.05.003\/1.2.07.001
\nLinksys RE6350 | 1.0.013.001\/1.0.04.001\/1.0.04.002\/1.1.05.003\/1.2.07.001
\nLinksys RE6500 | 1.0.013.001\/1.0.04.001\/1.0.04.002\/1.1.05.003\/1.2.07.001
\nLinksys RE7000 | 1.0.013.001\/1.0.04.001\/1.0.04.002\/1.1.05.003\/1.2.07.001
\nLinksys RE9000 | 1.0.013.001\/1.0.04.001\/1.0.04.002\/1.1.05.003\/1.2.07.001<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability lies in the function “check_port_conflict” of the file<\/a> “\/goform\/check_port_conflict. The manipulation of the argument “single_port_rule\/port_range_rule” can lead to a stack-based buffer overflow<\/a>. Buffer overflow<\/a> occurs when more data is put into a buffer than it can handle, causing an overflow of data into adjacent storage. This overflow can overwrite other data or cause the executing program to crash, potentially leading to execution of arbitrary code<\/a> or complete system compromise.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

POST \/goform\/check_port_conflict HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nsingle_port_rule=1&port_range_rule=%s<\/code><\/pre>\n
In the above example, `%s` represents a string of characters that is longer than what the buffer in the “check_port_conflict” function<\/a> can handle. This causes a buffer overflow, potentially allowing the attacker to execute arbitrary code<\/a> or compromise the entire system.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
In the absence of a patch from the vendor, it is recommended to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to detect and prevent any attempts to exploit this vulnerability<\/a>. Monitor network traffic for any unusual activity and ensure that all devices are running the latest firmware version.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview CVE-2025-9246 is a critical vulnerability found in several models of Linksys wireless range extenders. This flaw exposes the devices to the risk of a stack-based buffer overflow attack, which can be executed remotely. The affected devices include Linksys models RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000. This vulnerability is of significant importance because of […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[86],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-65128","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t