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  4. CVE 2026 107573 incorrect default permissions in hmailserver
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Back to active CVEs
High · CVSS 7.8CVE-2026-107573

Incorrect Default Permissions in hMailServerCVE-2026-107573

Answer in brief

CVE-2026-107573 records a High severity (CVSS 7.8) vulnerability in Incorrect Default Permissions in hMailServer. The current sources do not mark it as known exploited. The current feed maps Progressive Robot Ltd/hMailServer (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 8, 2026Updated Oct 8, 2026Source checked Oct 8, 2026First seen by HOL Oct 8, 2026Material review Oct 8, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Progressive Robot Ltd/hMailServer (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Progressive Robot Ltd/hMailServergeneric>=6.0.0 <6.3.66.3.6

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Progressive Robot Ltd/hMailServer.
  2. 2Review the reported fix. Source-reported solution: Upgrade to hMailServer 6.3.6, whose installer makes the data, log, temp, database and event folders and hMailServer.INI private to SYSTEM, the Administrators and the service at every installation and upgrade; then change the database password and the administrator password if accounts that are not administrators could sign in to the server. Until then, from an elevated prompt, remove the inherited entries for Users and the application package groups from those folders and the file with icacls (/inheritance:d, then /remove:g).

Evidence timeline and material changes

  1. Published upstream

    Oct 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 8, 2026

Sources and claim methodology

  • Source referencegitlab.com
  • Source referencegitlab.com
Upstream source description

Incorrect default permissions in the Windows installer of Progressive Robot hMailServer 6.0.0 through 6.3.5 allow a local authenticated user to read the mail server's data. The installer created the data, log, temp, database and event folders and the hMailServer.INI configuration file with the permissions inherited from the installation folder, by default under Program Files, which give the local Users group read access. Any user who can sign in to the computer could read every stored message, the logs, the built-in database with the accounts' password hashes whenever the service is stopped, and the configuration file, including the database password, which is sealed only with the machine's DPAPI key and can be unsealed by any local account; with an external database that password gives full control of it. The Linux AppImage of 6.3.0 through 6.3.5 likewise created its per-user data folders readable by other local users.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Inefficient Algorithmic Complexity in hMailServerSame progressive robot ltd/hmailserver package
  • Improper Link Resolution Before File Access ('Link Following') in hMailServerSame progressive robot ltd/hmailserver package
  • Inefficient Algorithmic Complexity in hMailServerSame progressive robot ltd/hmailserver package
  • Inefficient Algorithmic Complexity in hMailServerSame progressive robot ltd/hmailserver package
  • Inefficient Algorithmic Complexity in hMailServerSame progressive robot ltd/hmailserver package
  • Inefficient Algorithmic Complexity in hMailServerSame progressive robot ltd/hmailserver package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-276
Source
CVE List V5
Source checked
Oct 8, 2026
References
2 linked sources
Open source record