{"id":33266,"date":"2025-04-28T21:50:59","date_gmt":"2025-04-28T21:50:59","guid":{"rendered":""},"modified":"2025-05-14T05:21:01","modified_gmt":"2025-05-14T05:21:01","slug":"cve-2025-28035-pre-auth-remote-command-execution-vulnerability-in-totolink-a830r","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-28035-pre-auth-remote-command-execution-vulnerability-in-totolink-a830r\/","title":{"rendered":"CVE-2025-28035: Pre-Auth Remote Command Execution Vulnerability in TOTOLINK A830R<\/strong>"},"content":{"rendered":"

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

The cybersecurity landscape is continuously evolving with new threats emerging daily. One such security threat that has recently been identified is the CVE-2025-28035 vulnerability associated with TOTOLINK A830R V4.1.2cu.5182_B20201102. This vulnerability is particularly threatening due to its pre-auth remote command<\/a> execution nature via the setNoticeCfg function, which is processed through the NoticeUrl parameter. This implies that an attacker does not need authentication to exploit<\/a> the system, making it an especially severe security concern.<\/p>\n

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

CVE ID: CVE-2025-28035
\nSeverity: Critical (9.8 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system compromise<\/a> or data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

TOTOLINK A830R | V4.1.2cu.5182_B20201102<\/p>\n

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

The vulnerability lies in the setNoticeCfg function in TOTOLINK<\/a> A830R V4.1.2cu.5182_B20201102. More specifically, it is in the NoticeUrl parameter. An attacker can exploit this vulnerability by sending a malicious<\/a> request to this parameter. Since the vulnerability is pre-authentication<\/a>, the attacker does not need any user credentials or privileges. If successful, the attacker can remotely execute commands, potentially leading to complete system<\/a> compromise or data leakage.<\/p>\n

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

Given the nature of the vulnerability, an exploit could look something like this:<\/p>\n

POST \/setNoticeCfg HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"NoticeUrl\": \"1; \/bin\/sh -c 'command_here';\" }<\/code><\/pre>\n
In this example, the attacker is injecting a command<\/a> (`command_here`) to be run on the server. The `1;` before the command ensures that the command will execute regardless of the previous command’s<\/a> result.<\/p>\n
Mitigation Advice<\/strong><\/p>\n
If you are using TOTOLINK A830R V4.1.2cu.5182_B20201102, it is advised to apply the vendor patch immediately to remediate this vulnerability. If a patch is not available or cannot be applied immediately, consider using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as a temporary mitigation measure. However, these are just remedial actions and do not resolve the vulnerability<\/a>. Thus, applying the vendor patch at the earliest is strongly recommended.
\nAs always, stay vigilant and prioritize the security of your systems<\/a>. Regularly update your systems, use reliable security tools, and follow recommended cybersecurity practices to minimize risks and protect<\/a> your assets.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The cybersecurity landscape is continuously evolving with new threats emerging daily. One such security threat that has recently been identified is the CVE-2025-28035 vulnerability associated with TOTOLINK A830R V4.1.2cu.5182_B20201102. This vulnerability is particularly threatening due to its pre-auth remote command execution nature via the setNoticeCfg function, which is processed through the NoticeUrl parameter. 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":[80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-33266","post","type-post","status-publish","format-standard","hentry","category-uncategorized","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