{"id":33106,"date":"2025-04-28T15:48:00","date_gmt":"2025-04-28T15:48:00","guid":{"rendered":""},"modified":"2025-05-09T06:52:57","modified_gmt":"2025-05-09T06:52:57","slug":"cve-2025-28024-buffer-overflow-vulnerability-in-totolink-a810r-v4-1-2cu-5182-b20201026","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-28024-buffer-overflow-vulnerability-in-totolink-a810r-v4-1-2cu-5182-b20201026\/","title":{"rendered":"CVE-2025-28024: Buffer Overflow Vulnerability in TOTOLINK A810R V4.1.2cu.5182_B20201026<\/strong>"},"content":{"rendered":"

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

In the ever-evolving landscape of cybersecurity, vulnerabilities present a constant challenge. One such vulnerability has been discovered in TOTOLINK A810R V4.1.2cu.5182_B20201026, identified as CVE-2025-28024. This vulnerability affects the cstecgi.cgi and has the potential to lead<\/a> to a buffer overflow situation, which can result in system compromise or data leakage. Given the prevalence of TOTOLINK products, this vulnerability could potentially<\/a> affect a vast array of systems, making it a matter of significant concern for cybersecurity professionals.<\/p>\n

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

CVE ID: CVE-2025-28024
\nSeverity: Critical (9.8)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System Compromise, Data Leakage<\/a><\/p>\n

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

Product | Affected Versions<\/p>\n

TOTOLINK A810R<\/a> | V4.1.2cu.5182_B20201026<\/p>\n

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

The vulnerability in TOTOLINK A810R<\/a> V4.1.2cu.5182_B20201026 exists due to inadequate bounds checking on user-supplied data in the cstecgi.cgi. This can result in a buffer overflow<\/a> condition where an attacker can inject malicious code. If the malicious payload is crafted correctly, it can overwrite the software\u2019s stack, leading to arbitrary code execution<\/a>. This can further lead to a total system compromise or data<\/a> leakage.<\/p>\n

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

Here is a conceptual example of how the vulnerability might be exploited via<\/a> an HTTP request:<\/p>\n

POST \/cstecgi.cgi HTTP\/1.1\nHost: vulnerable-device-ip\nContent-Type: application\/x-www-form-urlencoded\noverflow_data=AAAAAAAAAAAAAAAAAAAAAAAAA...[repeat 'A' until overflow]...+malicious_code<\/code><\/pre>\n
In this example, the “overflow_data” parameter is filled with a large amount of ‘A’ characters, causing a buffer overflow<\/a>. Following this, the attacker’s malicious code<\/a> is attached, which would be executed due to the overflow.<\/p>\n
Mitigation<\/strong><\/p>\n
Users are advised to apply the vendor patch as soon as it becomes available. Until then, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation. Always practice safe cybersecurity hygiene by limiting exposure of critical systems<\/a> and maintaining up-to-date backups.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview In the ever-evolving landscape of cybersecurity, vulnerabilities present a constant challenge. One such vulnerability has been discovered in TOTOLINK A810R V4.1.2cu.5182_B20201026, identified as CVE-2025-28024. This vulnerability affects the cstecgi.cgi and has the potential to lead to a buffer overflow situation, which can result in system compromise or data leakage. Given the prevalence of TOTOLINK […]<\/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-33106","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