CVE-2026-103649

Published 8 October 2026 · tracked since 8 October 2026

Description

Missing network timeouts in the Linux builds of Progressive Robot hMailServer 6.3.0 through 6.3.5 allow a remote attacker to hold server threads indefinitely and so stop outbound mail delivery (denial of service). The server set its socket timeouts in the form Windows takes, which Linux refuses, and

References

• NVD — National Vulnerability Database
• CVE.org record (MITRE)
• CISA Known Exploited Vulnerabilities catalog

Latest tracked vulnerabilities

• CVE-2026-107573 HIGH 7.8
• CVE-2026-107275 MEDIUM 6.8
• CVE-2026-93509 MEDIUM 6.5
• CVE-2026-104660 HIGH 7.8
• CVE-2026-104671 MEDIUM 5.3
• CVE-2026-105190 MEDIUM 5.3
• CVE-2026-103010 HIGH 7.8
• CVE-2026-103011 MEDIUM 6.5
• CVE-2026-103517 MEDIUM 5.3
• CVE-2026-71183 HIGH 7.1

→ Open the live CVE board · all tools