What is CVE-2019-25646?

CVE-2019-25646 is a critical-severity vulnerability in Tabs Mail Carrier, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2026-03-24.

How severe is CVE-2019-25646?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Tabs Mail Carrier

CVE-2019-25646

Tabs Mail Carrier 2.5.1 contains a buffer overflow vulnerability in the MAIL FROM SMTP command that allows remote attackers to execute arbitrary code by sending a crafted MAIL FROM parameter. Attackers can connect to the SMTP service on po…

Vulnerability class: Buffer Overflow

EPSS: 0.002 (46.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Tabs Mail Carrier — versions 2.5.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

ExploitDB-46547 (exploit)
VulnCheck Advisory: Tabs Mail Carrier 2.5.1 Buffer Overflow via MAIL FROM (third-party-advisory)

Frequently asked questions

What is CVE-2019-25646?: CVE-2019-25646 is a critical-severity vulnerability in Tabs Mail Carrier, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2026-03-24.
How severe is CVE-2019-25646?: Critical severity. CVSS v3 base score is 9.8 out of 10.