What is CVE-2019-25364?

CVE-2019-25364 is a critical-severity vulnerability in Tabslab Mailcarrier, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-02-18.

How severe is CVE-2019-25364?

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

Buffer overflow in Tabslab Mailcarrier

CVE-2019-25364

MailCarrier 2.51 contains a buffer overflow vulnerability in the POP3 USER command that allows remote attackers to execute arbitrary code. Attackers can send a crafted oversized buffer to the POP3 service, overwriting memory and potentially gaining remote system access.

Vulnerability class: Buffer Overflow

EPSS: 0.008 (54.0th 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

Tabslab Mailcarrier — versions 2.51
Tabs Laboratories Corporation Win10 Mailcarrier — versions 2.51

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

ExploitDB-47554 (Exploit, exploit, Third Party Advisory)
Vendor Homepage (Product, product)
VulnCheck Advisory: Win10 MailCarrier 2.51 - 'POP3 User' Remote Buffer Overflow (Broken Link, third-party-advisory)

Frequently asked questions

What is CVE-2019-25364?: CVE-2019-25364 is a critical-severity vulnerability in Tabslab Mailcarrier, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-02-18.
How severe is CVE-2019-25364?: Critical severity. CVSS v3 base score is 9.8 out of 10.