# CVE-2025-42599: Qualitia Active! Mail Stack-Based Buffer Overflow Vulnerability

Source: https://junglewise.ai/threats/cve-2025-42599-qualitia-active-mail-stack-based-buffer-overflow-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-04-28. Updated: 2026-05-09  
License: CC BY 4.0 with a link back

CVE-2025-42599 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2025-04-28

Qualitia Active! mail 6 contains a stack-based buffer overflow vulnerability (CWE-121) due to improper handling of specially crafted requests. A remote, unauthenticated attacker can exploit this to execute arbitrary code or cause a denial-of-service (DoS) condition.

## Quick answers

**Is CVE-2025-42599 exploited in the wild?** Yes. CVE-2025-42599 is known to be exploited in the wild, first recorded on 28 April 2025. Treat it as urgent.

**How severe is CVE-2025-42599?** Critical severity, with a CVSS score of 9.8, published 28 April 2025.

**Which products and versions are affected?** Qualitia Active! mail 6 BuildInfo: 6.60.05008561 and earlier.

**Is there a fix for CVE-2025-42599?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2025-42599 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2025-42599?** Check whether you run Qualitia Active!mail. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Qualitia Active! mail 6 BuildInfo: 6.60.05008561 and earlier

## Timeline

- 2025-04-18: disclosed: Initial disclosure by JPCERT/CC and vendor advisory published.
- 2025-04-28: kev added: Added to CISA Known Exploited Vulnerabilities (KEV) catalog.