{"id":9757,"date":"2026-01-09T10:03:41","date_gmt":"2026-01-09T10:03:41","guid":{"rendered":"https:\/\/serisec.com\/index.php\/2026\/01\/09\/smartertools-smartermail-vulnerability-enables-remote-code-execution-attack-poc-released\/"},"modified":"2026-01-09T10:03:41","modified_gmt":"2026-01-09T10:03:41","slug":"smartertools-smartermail-vulnerability-enables-remote-code-execution-attack-poc-released","status":"publish","type":"post","link":"https:\/\/serisec.com\/index.php\/2026\/01\/09\/smartertools-smartermail-vulnerability-enables-remote-code-execution-attack-poc-released\/","title":{"rendered":"SmarterTools SmarterMail Vulnerability Enables Remote Code Execution Attack \u2013 PoC Released"},"content":{"rendered":"

SmarterTools SmarterMail Vulnerability Enables Remote Code Execution Attack \u2013 PoC Released
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A critical pre-authentication remote code execution vulnerability, identified as CVE-2025-52691<\/a>, has been discovered in SmarterTools\u2019 SmarterMail solution.<\/p>\n

The flaw received a maximum CVSS score of 10.0, indicating its severe nature and potential impact on affected systems.<\/p>\n

SmarterTools describes SmarterMail as \u201ca secure, all-in-one business email and collaboration server for Windows<\/a> and Linux \u2013 an affordable Microsoft Exchange alternative.\u201d The platform is widely used by organizations seeking email server solutions.<\/p>\n

\n\n\n\n\n\n
CVE ID<\/strong><\/th>\nCVSS Score<\/strong><\/th>\nVulnerability Type<\/strong><\/th>\nAffected Versions<\/strong><\/th>\n<\/tr>\n<\/thead>\n
CVE-2025-52691<\/td>\n10.0 (Critical)<\/td>\nPre-Authentication Remote Code Execution<\/td>\nBuild 9406 and earlier<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

SmarterTools SmarterMail RCE Vulnerability<\/strong><\/h2>\n

Security researchers at Singapore\u2019s Centre for Strategic Infocomm Technologies (CSIT) discovered the vulnerability, which exploits an unauthenticated file-upload endpoint in the application.<\/p>\n

\"notification
notification of vulnerability<\/figcaption><\/figure>\n

The flaw exists in the\u00a0\/api\/upload\u00a0route, specifically within the\u00a0FileUploadController.Upload\u00a0method that requires no authentication to access.<\/p>\n

The vulnerability leverages a path traversal<\/a> weakness in the GUID parameter validation.<\/p>\n

Attackers can manipulate the\u00a0contextData\u00a0parameter to include a malicious GUID value<\/a>, thereby bypassing the restricted upload directory and writing arbitrary files to any location on the system, including web-accessible directories.<\/p>\n

By crafting a specially formatted multipart\/form-data HTTP request with path traversal sequences.<\/p>\n

\"path
path traversal exploit<\/figcaption><\/figure>\n

Threat actors can upload malicious ASPX webshells to the server\u2019s root directory, achieving complete remote code execution without authentication.<\/p>\n

The vulnerability was silently fixed in build 9413, released on October 10, 2025. However, the official advisory from Singapore\u2019s Cyber Security Agency (CSA) wasn\u2019t published until late December 2025.<\/p>\n

This three-month gap raised concerns about silent patching<\/a> practices, as customers remained unaware of the critical vulnerability for approximately 2.5 months after the fix was deployed.<\/p>\n

WatchTowr Labs has released<\/a> a Detection Artifact Generator on GitHub to help organizations identify their exposure and build detection rulesets.<\/p>\n

\"security
security fixes<\/figcaption><\/figure>\n

The tool has been verified on both Windows installations with newer builds and older versions.<\/p>\n

Organizations running SmarterMail should immediately update to build 9413 or later to protect against potential exploitation of this critical vulnerability.<\/p>\n

Follow us on Google News<\/a>, LinkedIn<\/a>, and X<\/a> for daily cybersecurity updates. Contact us<\/a> to feature your stories.<\/strong><\/p>\n

The post SmarterTools SmarterMail Vulnerability Enables Remote Code Execution Attack \u2013 PoC Released<\/a> appeared first on Cyber Security News<\/a>.<\/p>\n<\/div>\n

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SmarterTools SmarterMail Vulnerability Enables Remote Code Execution Attack \u2013 PoC Released A critical pre-authentication remote code execution vulnerability, identified as CVE-2025-52691, has been discovered in SmarterTools\u2019 SmarterMail solution. The flaw received a maximum CVSS score of 10.0, indicating its severe nature and potential impact on affected systems. SmarterTools describes SmarterMail as \u201ca secure, all-in-one business […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[129,63,131,648],"tags":[130],"class_list":["post-9757","post","type-post","status-publish","format-standard","hentry","category-cyber-security","category-cyber-security-news","category-vulnerability","category-vulnerability-news","tag-cyber-security-news"],"_links":{"self":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/9757"}],"collection":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/comments?post=9757"}],"version-history":[{"count":0,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/9757\/revisions"}],"wp:attachment":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/media?parent=9757"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/categories?post=9757"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/tags?post=9757"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}