{"id":87239,"date":"2026-07-19T10:02:49","date_gmt":"2026-07-19T10:02:49","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-3681-critical-buffer-overflow-vulnerability-in-pcman-ftp-server-2-0-7","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-3681-critical-buffer-overflow-vulnerability-in-pcman-ftp-server-2-0-7\/","title":{"rendered":"<strong>CVE-2025-3681: Critical Buffer Overflow Vulnerability in PCMan FTP Server 2.0.7<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The PCMan FTP Server 2.0.7 has been identified to have a critical vulnerability, CVE-2025-3681, that affects its MODE Command Handler component. This vulnerability leads to a buffer overflow, which is potentially damaging as it can lead to system compromise or data leakage. This issue is of high concern as it can be exploited remotely, and the details of the vulnerability have been publicly disclosed.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-3681<br \/>\nSeverity: Critical, CVSS Score: 7.3<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Successful exploitation could lead to system compromise and potential data leakage.<\/p>\n<p><strong>Affected Products<\/strong><\/p>\n<p>Product | Affected Versions<\/p>\n<p>PCMan FTP Server | 2.0.7<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability exists due to insufficient bounds checking within the MODE Command Handler of the PCMan FTP Server. When the server receives an excessively long MODE command, it attempts to store this input in a fixed-size buffer, leading to a buffer overflow. This overflow can cause the application to crash, but it could also allow an attacker to execute arbitrary code on the system with the privileges of the application.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p>\n<p>The following is a conceptual example of how the vulnerability might be exploited, using an FTP command:<br \/>\n&#8220;`ftp<br \/>\nMODE 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The PCMan FTP Server 2.0.7 has been identified to have a critical vulnerability, CVE-2025-3681, that affects its MODE Command Handler component. This vulnerability leads to a buffer overflow, which is potentially damaging as it can lead to system compromise or data leakage. This issue is of high concern as it can be exploited remotely, [&hellip;]<\/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":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-87239","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"Overview The PCMan FTP Server 2.0.7 has been identified to have a critical vulnerability, CVE-2025-3681, that affects its MODE Command Handler component. This vulnerability leads to a buffer overflow, which is potentially damaging as it can lead to system compromise or data leakage. This issue is of high concern as it can be exploited remotely,\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Ameeba\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3681-critical-buffer-overflow-vulnerability-in-pcman-ftp-server-2-0-7\/\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.4\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ameeba Blog - Your Guide to a Safer Digital World.\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"CVE-2025-3681: Critical Buffer Overflow Vulnerability in PCMan FTP Server 2.0.7 - Ameeba Blog\" \/>\n\t\t<meta property=\"og:description\" content=\"Overview The PCMan FTP Server 2.0.7 has been identified to have a critical vulnerability, CVE-2025-3681, that affects its MODE Command Handler component. 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This issue is of high concern as it can be exploited remotely,\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3681-critical-buffer-overflow-vulnerability-in-pcman-ftp-server-2-0-7\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/02\/image-5.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/02\/image-5.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-07-19T10:02:49+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"-001-11-30T00:00:00+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"CVE-2025-3681: Critical Buffer Overflow Vulnerability in PCMan FTP Server 2.0.7 - Ameeba Blog\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Overview The PCMan FTP Server 2.0.7 has been identified to have a critical vulnerability, CVE-2025-3681, that affects its MODE Command Handler component. 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