CVE-2026-114471 Progressive Robot Ltd CVE debrief

Who should care

System administrators and security teams responsible for hMailServer installations should assess exposure and prioritize remediation. Local users with access to log files may be able to obtain sensitive information.

Why it matters

Defenders should care about CVE-2026-114471 because it allows local users to obtain credentials from log files, potentially leading to unauthorized access. System administrators and security teams should assess exposure, prioritize remediation, and verify log file access controls and SMTP logging configurations.

• Credential exposure through log file access.
• Potential for offline password guessing using SCRAM-SHA-256 client proofs.
• Compensating controls may be necessary for sensitive information protection.
• Verification of log file access controls and SMTP logging configurations is required.

Technical summary

The SMTP server of Progressive Robot hMailServer 6.0.0 through 6.3.6 logs sensitive information, including credentials, under certain conditions. The server only properly hid the credential of an AUTH PLAIN command when sent after EHLO in one exact form. Other authentication methods, such as OAuth 2.0 bearer tokens and SCRAM-SHA-256 client proofs, were not properly concealed. Affected product deployments should be identified in managed environments, and owners should assess exposure and prioritize remediation based on the official advisory or CVE record. Compensating controls may be necessary for sensitive information protection, and verification of log file access controls and SMTP logging configurations is a

Defensive priority

Defenders should prioritize verifying log file access controls, reviewing SMTP logging configurations, and updating to version 6.3.7 or later.

Recommended defensive actions

• Verify log file access controls to prevent unauthorized access.
• Review SMTP logging configurations to ensure sensitive information is not exposed.
• Update to version 6.3.7 or later to address the vulnerability.
• Monitor logs for potential credential exposure.
• Consider compensating controls for sensitive information protection.

Evidence notes

The CVE record and source item provide details on the vulnerability, including the affected versions and configurations. However, the corpus does not establish exploitation or specific impact, requiring verification from official sources.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.