{"id":28750,"date":"2025-04-22T05:40:02","date_gmt":"2025-04-22T05:40:02","guid":{"rendered":""},"modified":"2025-09-26T20:58:54","modified_gmt":"2025-09-27T02:58:54","slug":"cve-2025-25456-buffer-overflow-vulnerability-in-tenda-ac10-v4-0si-v16-03-10-20","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-25456-buffer-overflow-vulnerability-in-tenda-ac10-v4-0si-v16-03-10-20\/","title":{"rendered":"CVE-2025-25456: Buffer Overflow Vulnerability in Tenda AC10 V4.0si_V16.03.10.20<\/strong>"},"content":{"rendered":"

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

The security of our digital landscape is constantly under threat from hackers trying to exploit system vulnerabilities. The recent discovery of a critical vulnerability, CVE-2025-25456, in Tenda AC10 V4.0si_V16.03.10.20, is a stark reminder of the importance of regular system updates and patch application. This flaw is a serious concern due to its high severity<\/a> and potential impact on confidentiality, integrity, and availability of data.
\nThe vulnerability affects Tenda<\/a> AC10 V4.0si_V16.03.10.20, a widely used wireless router. As a buffer overflow<\/a> vulnerability, it’s susceptible to exploitation by malicious actors. This could lead to serious implications including potential system<\/a> compromise or data leakage, creating significant risk for users.<\/p>\n

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

CVE ID: CVE-2025-25456
\nSeverity: Critical – CVSS 9.8
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise, potential data leakage<\/a><\/p>\n

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

Product | Affected Versions<\/p>\n

Tenda AC10<\/a> | V4.0si_V16.03.10.20<\/p>\n

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

The vulnerability resides in the AdvSetMacMtuWan function of the Tenda<\/a> AC10 V4.0si_V16.03.10.20. It’s a buffer overflow vulnerability<\/a>, which happens when more data is put into a buffer or holding area than the buffer can handle. This causes an overflow of data that can overwrite other data points, potentially leading<\/a> to erratic program behavior, system crashes, or exploitable conditions for attackers.
\nIn this case, an attacker can exploit the vulnerability<\/a> by sending a specially crafted request to the mac2 parameter of the AdvSetMacMtuWan function. This causes the buffer to overflow and allows the attacker to execute arbitrary code<\/a> or potentially gain control of the system.<\/p>\n

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

An attacker might exploit this vulnerability<\/a> through a malicious HTTP request that could look something like this:<\/p>\n

POST \/AdvSetMacMtuWan\/mac2 HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"mac2\": \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\u2026\" }<\/code><\/pre>\n
In this example, the ‘A’s represent a large amount of data exceeding the buffer’s capacity, leading to overflow and the potential execution of malicious code<\/a>.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
Users of Tenda AC10 V4.0si_V16.03.10.20 are advised to apply the vendor patch as soon as possible to mitigate the risk. In the absence of a vendor patch, deploying a Web<\/a> Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. It’s crucial to regularly update systems and apply patches promptly to protect against such vulnerabilities<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The security of our digital landscape is constantly under threat from hackers trying to exploit system vulnerabilities. The recent discovery of a critical vulnerability, CVE-2025-25456, in Tenda AC10 V4.0si_V16.03.10.20, is a stark reminder of the importance of regular system updates and patch application. This flaw is a serious concern due to its high severity […]<\/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-28750","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