{"id":70809,"date":"2025-09-03T19:39:55","date_gmt":"2025-09-03T19:39:55","guid":{"rendered":""},"modified":"2025-09-27T17:53:09","modified_gmt":"2025-09-27T23:53:09","slug":"cve-2025-9527-remote-stack-based-buffer-overflow-vulnerability-in-linksys-e1700-routers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-9527-remote-stack-based-buffer-overflow-vulnerability-in-linksys-e1700-routers\/","title":{"rendered":"CVE-2025-9527: Remote Stack-based Buffer Overflow Vulnerability in Linksys E1700 Routers<\/strong>"},"content":{"rendered":"

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

The vulnerability identified as CVE-2025-9527 is a severe flaw in the Linksys E1700 1.0.0.4.003 router, primarily affecting the QoSSetup function. This vulnerability is of significant concern as it exposes the system to remote attacks, enabling potential unauthorized access, system compromise, and data leakage. The exploit has been made public, indicating that any malicious actor with knowledge of the vulnerability<\/a> can exploit it, escalating the urgency of immediate mitigation.<\/p>\n

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

CVE ID: CVE-2025-9527
\nSeverity: High (8.8 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system<\/a> compromise and data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

Linksys E1700 | 1.0.0.4.003<\/p>\n

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

The vulnerability resides in the QoSSetup function of the file<\/a> \/goform\/QoSSetup. It arises due to improper<\/a> handling of the ‘ack_policy’ argument. By manipulating this argument, an attacker can cause a stack-based buffer overflow<\/a>. This overflow can lead<\/a> to arbitrary code execution, thus allowing the attacker to compromise the system remotely.<\/p>\n

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

The following conceptual example demonstrates how an attacker might exploit this vulnerability. This pseudocode represents a malicious HTTP request to the vulnerable<\/a> endpoint:<\/p>\n

POST \/goform\/QoSSetup HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nack_policy=AAAA...[long string of \"A\"s to trigger the buffer overflow]<\/code><\/pre>\n
Mitigation Guidance<\/strong><\/p>\n
Affected users are strongly advised to apply the vendor patch as soon as it is available. Until then, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation measure to detect and block potential exploitation<\/a> attempts.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The vulnerability identified as CVE-2025-9527 is a severe flaw in the Linksys E1700 1.0.0.4.003 router, primarily affecting the QoSSetup function. This vulnerability is of significant concern as it exposes the system to remote attacks, enabling potential unauthorized access, system compromise, and data leakage. The exploit has been made public, indicating that any malicious actor […]<\/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":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-70809","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-rce"],"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