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CRITICAL CISA KEV

CVE-2025-42599

CVSS v3

9.8

CRITICAL

EPSS Score

3.3 %

exploit probability, as of 2026-10-18

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2025-42599 yet.

Full record on NVD

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.

CISA Known Exploited Vulnerability

Date Added
2025-04-28
Patch Due Date
2025-05-19
Ransomware Use
Unknown

Technical details

Published
2025-04-18

Frequently asked questions

What is CVE-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.

Is CVE-2025-42599 actively exploited?

Yes. CVE-2025-42599 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2025-05-19.

What is the CVSS score for CVE-2025-42599?

CVE-2025-42599 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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