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CVE-2025-42599

Qualitia Active! Mail Stack-Based Buffer Overflow

9.8 CRITICALActively exploited (CISA KEV)EPSS 3.30%
  1. Published18 Apr 2025
  2. Added to CISA KEV28 Apr 2025
  3. Remediation due19 May 2025
Actively exploited (CISA KEV)

Qualitia Active! Mail contains a stack-based buffer overflow vulnerability that allows a remote, unauthenticated attacker to execute arbitrary or trigger a denial-of-service via a specially crafted request.

Added to KEV: 28 Apr 2025Federal remediation due: 19 May 2025

Description

Active! mail 6 BuildInfo: 6.60.05008561 and earlier contains a stack-based buffer overflow vulnerability. Receiving a specially crafted request created and sent by a remote unauthenticated attacker may lead to arbitrary code execution and/or a denial-of-service (DoS) condition.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Qualitia Active! Mail< 6.60.05008562

Remediation

Fixed in
Qualitia Active! Mail≥ 6.60.05008562

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Frequently asked

Is CVE-2025-42599 being actively exploited?

Yes. CVE-2025-42599 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 28 Apr 2025.

How severe is CVE-2025-42599?

CVE-2025-42599 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 3.30% probability of exploitation.

Which products are affected by CVE-2025-42599?

Affected products include Qualitia Active! Mail.

How do I fix CVE-2025-42599?

Upgrade affected software to a fixed version, for example Qualitia Active! Mail 6.60.05008562 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-42599 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.