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Cyber Security
Independent · Digital
Thehackingpost
CybersecurityAI-assisted

Critical Vulnerability in SmarterMail Let Attackers Execute Remote Code

SmarterTools has released a security advisory addressing a critical vulnerability in SmarterMail that allows attackers to execute remote code on mail servers.

SmarterTools has released a security advisory addressing a critical vulnerability in SmarterMail that allows attackers to execute remote code on mail servers.

The vulnerability, identified as CVE-2025-52691, poses significant risks to organizations utilizing affected versions.

With a CVSS score of 10.0, the vulnerability is classified as critical, necessitating immediate remediation by impacted organizations.

CVE ID CVSS Score Affected Versions Vulnerability Type Attack Vector

CVE-2025-52691 10.0 SmarterMail Build 9406 and earlier Remote Code Execution (RCE) Remote, unauthenticated

The CVE-2025-52691 vulnerability allows unauthenticated attackers to upload arbitrary files to any location on the mail server without requiring credentials.

The vulnerability, identified as CVE-2025-52691, poses significant risks to organizations utilizing affected versions.
Hazel Caldwell · Thehackingpost

This vulnerability facilitates remote code execution, potentially granting threat actors full control over compromised systems.

The unauthenticated nature of this exploit increases the risk significantly, as attackers can exploit the vulnerability without bypassing authentication mechanisms.

Exploitation of this vulnerability could result in unauthorized access to sensitive email communications, malware deployment, data exfiltration, and potential lateral movement within corporate networks.

Organizations using vulnerable versions are at immediate risk of compromise. The vulnerability impacts SmarterMail versions Build 9406 and earlier.

Organizations should promptly verify their current version and prioritize patching efforts. SmarterTools has released Build 9413 to address this critical security flaw.

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Administrators are advised to update all SmarterMail installations immediately to mitigate the vulnerability. Delayed patching leaves mail servers vulnerable to potential attacks.

The vulnerability was discovered by Chua Meng Han from the Centre for Strategic Infocomm Technologies (CSIT).

The Cyber Security Agency (CSA) of Singapore coordinated responsible disclosure with SmarterTools Inc., ensuring a fix was available before public release.

Organizations using SmarterMail should treat this vulnerability as a critical priority and implement the security update without delay.

Based on reporting by Cyber Security News.

AI transparency. This article was produced with the assistance of artificial intelligence and published under human editorial oversight. AI systems can make mistakes. Read how we use AI (EU AI Act, Art. 50).
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