Threats / Qualitia / CVE-2025-42599
CVE-2025-42599
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Qualitia Active! Mail vulnerability
Qualitia Active! Mail contains a stack-based buffer overflow vulnerability allowing remote unauthenticated attackers to execute arbitrary code or cause denial of service.
Verdict
Today item — known-exploited.
A remote, unauthenticated attacker can exploit a stack-based buffer overflow in Qualitia Active! Mail via specially crafted requests to achieve arbitrary code execution or trigger service disruption.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
4 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-04-28).
Probability (EPSS)
EPSS 0.0302 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Qualitia, Active! Mail. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-121 Stack-based Buffer Overflow — weakness family: Memory safety.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious request designed to overflow the stack buffer in the mail service.
Business
The organization's mail service becomes vulnerable to unauthorized access and control.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I send the payload to the unauthenticated endpoint without requiring credentials.
Business
Authentication controls fail to prevent exploitation, expanding the attack surface.
3
Lateral reach — past segmentation narrative 3
Attacker
I execute arbitrary code on the affected system or crash the mail service.
Business
Critical business communications are disrupted or compromised, affecting operations and data integrity.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05