ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2025-42599

Qualitia Active! Mail Stack-Based Buffer Overflow Vulnerability

Published Apr 17, 2025 · catalog updated Sep 24, 2026 · QUALITIA CO., LTD. Active! mail 6

Patch now

CVE-2025-42599 is in the CISA known-exploited catalog, due May 19, 2025. Confirm QUALITIA CO., LTD. Active! mail 6 against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
3.30%
Remediation
Remediation guidance
Affected products
cpe qualitia/active! mail · vendor QUALITIA CO., LTD. Active! mail 6 BuildInfo: 6.60.05008561 and earlier · vendor Qualitia Active! Mail

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe qualitia/active! mailversion unspecified
  • vendor QUALITIA CO., LTD. Active! mail 6 BuildInfo: 6.60.05008561 and earlierBuildInfo: 6.60.05008561 and earlier
  • vendor Qualitia Active! Mailversion unspecified

How to fix CVE-2025-42599

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-42599 is in the CISA known-exploited catalog, due May 19, 2025. Confirm QUALITIA CO., LTD. Active! mail 6 against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with QUALITIA CO., LTD. Active! mail 6 BuildInfo: 6.60.05008561 and earlier BuildInfo: 6.60.05008561 and earlier. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-121: Stack-based Buffer Overflow. EPSS 3.30%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 17, 2025 · Catalog

    Detected

    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.

  2. Apr 28, 2025 · CISA KEV

    Known exploited

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  3. May 19, 2025 · CISA KEV

    Remediation due

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  4. Sep 24, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2025-42599

    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.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2025-42599

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-42599

    30-day exploitation probability 3.3%

    first.org
  • EUVDVulnerability recordEUVD-2025-11849

    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.

    euvd.enisa.europa.eu
  • NIST NVDVulnerability recordCVE-2025-42599

    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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2025-42599

    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.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.