{"id":76121,"date":"2025-09-24T19:09:14","date_gmt":"2025-09-24T19:09:14","guid":{"rendered":""},"modified":"2025-10-21T06:15:09","modified_gmt":"2025-10-21T12:15:09","slug":"cve-2025-10666-remote-buffer-overflow-vulnerability-in-d-link-dir-825-routers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-10666-remote-buffer-overflow-vulnerability-in-d-link-dir-825-routers\/","title":{"rendered":"CVE-2025-10666: Remote Buffer Overflow Vulnerability in D-Link DIR-825 Routers<\/strong>"},"content":{"rendered":"

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

A severe vulnerability, CVE-2025-10666, that affects the D-Link DIR-825 routers up to version 2.10, has emerged in the cybersecurity landscape. This flaw, found in the function sub_4106d4 of the file apply.cgi, allows for a buffer overflow attack when the argument countdown_time is manipulated. As this exploit can be executed remotely<\/a>, it poses a serious threat to users of the affected routers, potentially leading to system compromise or data leakage. The fact that the exploit has been made public and affects products that are no longer supported by the maintainer adds to the gravity of the situation.<\/p>\n

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

CVE ID: CVE-2025-10666
\nSeverity: High (8.8 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system<\/a> compromise or data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

D-Link DIR-825<\/a> | Up to 2.10<\/p>\n

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

The vulnerability lies within the function sub_4106d4 of the file<\/a> apply.cgi. The countdown_time argument of this function is improperly validated<\/a>, allowing for manipulation. An attacker can exploit this flaw by sending specially crafted data<\/a> to the countdown_time argument that exceeds the buffer size. This causes an overflow of the buffer<\/a>, which can result in arbitrary code execution, potentially compromising the entire system or leading to data leakage.<\/p>\n

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

Here is a conceptual HTTP request that might be used to exploit this vulnerability<\/a>:<\/p>\n

POST \/apply.cgi HTTP\/1.1\nHost: target_router_IP\nContent-Type: application\/x-www-form-urlencoded\ncountdown_time=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...[continued until buffer overflow occurs]<\/code><\/pre>\n
In this example, the countdown_time value is filled with an excessive amount of ‘A’ characters, triggering a buffer overflow<\/a>. This is a simplified representation; in a real-world scenario, the malicious payload could contain carefully crafted machine code to execute<\/a> specific commands or functions on the target system.
\nPlease remember that this information is for educational purposes only and should not be used with malicious intent.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A severe vulnerability, CVE-2025-10666, that affects the D-Link DIR-825 routers up to version 2.10, has emerged in the cybersecurity landscape. This flaw, found in the function sub_4106d4 of the file apply.cgi, allows for a buffer overflow attack when the argument countdown_time is manipulated. As this exploit can be executed remotely, it poses a serious […]<\/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-76121","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