Applied Cybernetics Group
Threat intel → detection pipeline
Monday, October 5, 2026
Data as of 09:42 UTC

Qualitia Active! Mail Stack-Based Buffer Overflow Vulnerability

Added to KEV
2025-04-28
Federal due date
2025-05-19
Vendor
Qualitia
Product
Active! Mail
EPSS
88.1th percentile (score 0.033, as of 2026-10-04)
NVD CVSS v3.1
9.8 (CRITICAL)
Ransomware use
Unknown
ATT&CK
T1059 , T1190 , T1499 , T1588.006 · signal rollup
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2025-42599

CISA short description

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.

Required action

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

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.

EPSS percentile is the FIRST.org exploit-probability ranking as of the date noted above; it moves daily. CVSS reflects NVD's analysis at time of publication.