Platform
linux
Component
openfind-mailgates
Fixed in
5.2.10.099
6.1.10.054
CVE-2026-6350 describes a stack-based buffer overflow vulnerability discovered in MailGates, a product developed by Openfind. This vulnerability allows unauthenticated remote attackers to execute arbitrary code, leading to a complete system compromise. The vulnerability affects versions 5.0 through 6.1.10.054 of MailGates, and a patch is available in version 6.1.10.054.
The impact of this buffer overflow is severe. An attacker can exploit it to execute arbitrary code on the affected system with no authentication required. This could lead to complete system takeover, data exfiltration, and the installation of persistent malware. Given the lack of authentication requirements, the vulnerability presents a significant attack surface. Successful exploitation could allow an attacker to pivot to other systems within the network, expanding the blast radius significantly. The ability to execute arbitrary code makes this a high-priority vulnerability to address.
CVE-2026-6350 was publicly disclosed on 2026-04-16. The vulnerability's criticality (CVSS 9.8) and ease of exploitation (unauthenticated remote access) suggest a high probability of exploitation. Currently, there are no publicly available proof-of-concept exploits, but the vulnerability's severity warrants immediate attention. It is not listed on the CISA KEV catalog as of this writing.
Exploit Status
EPSS
0.08% (23% percentile)
CISA SSVC
CVSS Vector
The primary mitigation for CVE-2026-6350 is to upgrade MailGates to version 6.1.10.054 or later, which contains the fix. If an immediate upgrade is not possible, consider implementing temporary workarounds such as strict input validation on all incoming data to MailGates. Network segmentation can also limit the potential impact by restricting access to the MailGates server. Monitor system logs for unusual activity or attempts to exploit the vulnerability. After upgrade, confirm by sending a test email and verifying that the system remains stable and does not exhibit any unexpected behavior.
Update MailGates to version 5.2.10.099 or later, or to version 6.1.10.054 or later to mitigate the stack buffer overflow vulnerability. Refer to the official Openfind documentation for detailed upgrade instructions. Apply security patches and keep the software updated to prevent future vulnerabilities.
Vulnerability analysis and critical alerts directly to your inbox.
CVE-2026-6350 is a critical buffer overflow vulnerability in MailGates versions 5.0–6.1.10.054, allowing attackers to execute arbitrary code.
If you are running MailGates versions 5.0 through 6.1.10.054, you are potentially affected by this vulnerability.
Upgrade MailGates to version 6.1.10.054 or later to resolve the vulnerability. Consider temporary workarounds if immediate upgrade is not possible.
While no public exploits are currently available, the vulnerability's severity suggests a high probability of exploitation.
Refer to the Openfind security advisory for CVE-2026-6350 for detailed information and updates.
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