CVE-2025-42599
Published: April 28, 2025
Official 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.
CISA KEV Advisory
Qualitia Active! Mail Stack-Based Buffer Overflow Vulnerability
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.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Risk Analysis
This high-severity stack-based buffer overflow in Qualitia Active! Mail allows a remote, unauthenticated attacker to execute arbitrary code or trigger a denial-of-service. Its presence in CISA's KEV catalog indicates confirmed exploitation, making it an urgent concern.
Active exploitation of this vulnerability has been observed in the wild, as confirmed by its inclusion in CISA's KEV catalog. The flaw is remotely exploitable without authentication.
Apply all available security updates for Qualitia Active! Mail. Implement network intrusion detection systems to identify and block specially crafted requests, and ensure proper network segmentation.
Technical Analysis
CVE-2025-42599 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2025-42599 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2025-42599 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1