PatchTheCVECVE-2025-42599: Qualitia Active! Mail Stack-Based Buffer Overflow Vulnerability
CVE-2025-42599 is a critical-severity flaw (CVSS 9.8) affecting active\! mail, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- Exploited in the wild (CISA KEV)
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 3.4% (top 11%) |
| CISA exploited list | Yes, fix due 2025-05-19 |
| Weakness | CWE-121 |
| Published | 2025-04-18 |
| Last modified | 2026-09-24 |
Last updated 2026-09-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Exploited Added to the CISA Known Exploited Vulnerabilities list
- Deadline CISA due date for US federal agencies to patch
- Updated Record last modified
Exact fixes by distribution
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-42599?
active\! mail: upgrade to 6.60.05008562. Exact commands for each OS are on this page.
Is CVE-2025-42599 being exploited?
Yes. CVE-2025-42599 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.
What does CVE-2025-42599 affect?
CVE-2025-42599 affects active\! mail. Severity is critical (CVSS 9.8). 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/o
How urgent is CVE-2025-42599?
Priority 89/100. Critical severity; Exploited in the wild (CISA KEV); CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action