{"id":71221,"date":"2025-09-04T08:44:02","date_gmt":"2025-09-04T08:44:02","guid":{"rendered":""},"modified":"2025-10-20T15:23:07","modified_gmt":"2025-10-20T21:23:07","slug":"cve-2025-55583-critical-unauthenticated-os-command-injection-vulnerability-in-d-link-dir-868l-b1-router-firmware","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-55583-critical-unauthenticated-os-command-injection-vulnerability-in-d-link-dir-868l-b1-router-firmware\/","title":{"rendered":"CVE-2025-55583: Critical Unauthenticated OS Command Injection Vulnerability in D-Link DIR-868L B1 Router Firmware<\/strong>"},"content":{"rendered":"

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

The cybersecurity world is no stranger to vulnerabilities, but CVE-2025-55583 is one that holds a particularly high risk. This vulnerability resides in the D-Link DIR-868L B1 router firmware version FW2.05WWB02. It is an unauthenticated OS command injection vulnerability that can be exploited remotely<\/a>, making it a critical issue for users and IT administrators. As routers form the backbone of internet connectivity in homes and businesses alike, the severity of this vulnerability<\/a> cannot be understated. A successful exploit could potentially compromise the system or even lead to data<\/a> leakage, thus posing a massive privacy and security threat.<\/p>\n

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

CVE ID: CVE-2025-55583
\nSeverity: Critical (9.8\/10)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system<\/a> compromise, data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

D-Link DIR-868L B1 Router | FW2.05WWB02<\/p>\n

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

The exploit takes advantage of an unauthenticated OS command injection vulnerability<\/a> in the fileaccess.cgi component of the D-Link DIR-868L B1 router firmware. The endpoint \/dws\/api\/UploadFile accepts a pre_api_arg parameter that is directly passed to system-level shell execution functions without any sanitization or authentication<\/a>. An attacker can craft malicious HTTP requests to this endpoint, allowing them to execute arbitrary commands<\/a> as the root user on the system.<\/p>\n

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

A conceptual example of how this vulnerability might be exploited is as follows:<\/p>\n

POST \/dws\/api\/UploadFile HTTP\/1.1\nHost: vulnerable.router.ip\nContent-Type: application\/json\n{ \"pre_api_arg\": \"; rm -rf \/;\" }<\/code><\/pre>\n
In this example, the attacker is using the “pre_api_arg” parameter to inject a malicious command<\/a> (; rm -rf \/;) that would delete all files in the system. This is purely illustrative and demonstrates the potential severity of the vulnerability<\/a>.<\/p>\n
Mitigation<\/strong><\/p>\n
Users are advised to apply the vendor patch as soon as possible to mitigate the risk of this vulnerability<\/a>. If the patch cannot be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation, blocking potential exploit<\/a> attempts. As always, keeping your systems and applications updated with the latest patches and security fixes is the most effective way to protect against vulnerabilities<\/a> like CVE-2025-55583.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The cybersecurity world is no stranger to vulnerabilities, but CVE-2025-55583 is one that holds a particularly high risk. This vulnerability resides in the D-Link DIR-868L B1 router firmware version FW2.05WWB02. It is an unauthenticated OS command injection vulnerability that can be exploited remotely, making it a critical issue for users and IT administrators. As […]<\/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":[78],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-71221","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-injection"],"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