CVE-2025-42599
Actively exploited. CVE-2025-42599 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-04-28) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
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.
CSIRTS triage
- What
- The vulnerability allows a remote, unauthenticated attacker to execute arbitrary code or trigger a denial-of-service.
- Who is affected
- Deployments of Qualitia Active! Mail are affected.
- Urgency
- Immediate action is required due to active exploitation and critical severity.
- Action
- Patch to the latest version of Qualitia Active! Mail.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch CVE-2025-42599
Get an email if CVE-2025-42599 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.
Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 86% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2025-42599: Qualitia Active! Mail Stack-Based Buffer Overflow Vulnerabilitycisa-kev · 2025-04-28
External references
Embed the live status
— this badge updates automatically when the KEV or exploit status changes. How to embed it →
[](https://www.csirts.com/cve/CVE-2025-42599)