P4Verified

CVE-2026-103010: hMailServer 6.0.0 to before 6.3.4

CVE-2026-103010. CVSS 3.1 base score 7.8 (HIGH, Vendor/CNA).

Affected technology

hMailServer · 6.0.0 to before 6.3.4
Progressive Robot Ltd

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Local · Low privileges required · No user interaction required

What an attacker can do

A local interactive user with no hMailServer credentials can write bytes of their choosing past the end of a 255-byte heap buffer in the hMailServer service process, which runs as LocalSystem by default. Vendor/CNA’s CVSS 3.1 assessment (base score 7.8/10) rates confidentiality, integrity and availability impact as high.

Published 2026-10-08 17:34:50.914914+00:00

CWE: CWE-122
CCR priority: 31.2 /100 (P4)
CVSS 3.1: 7.8 /10 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · Vendor/CNA
KEV: no

Provenance

GitHub Advisory Database · Source record · observed 2026-10-08 18:27:24.781324+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-08 17:32:11.049884+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-103010.html