PT-2026-20539 · Unknown · Mailcarrier

Published 2026-02-18 · Updated 2026-02-18 · CVE-2019-25364

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions MailCarrier version 2.51

Description MailCarrier 2.51 has a buffer overflow issue in the POP3 USER command. Remote attackers can exploit this by sending a specially crafted, oversized buffer to the POP3 service. This can overwrite memory and potentially allow for remote system access. The vulnerable command is POP3 USER. The vulnerable parameter is the buffer sent with the USER command.

Recommendations Update MailCarrier to a version that addresses this issue. As a temporary workaround, consider disabling the POP3 service if it is not essential.

Exploit

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2019-25364

Affected Products

Mailcarrier

References · 5

• 🔥 https://exploit-db.com/exploits/47554 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2019-25364 · Security Note
• https://osv.dev/vulnerability/CVE-2019-25364 · Vendor Advisory
• https://vulncheck.com/advisories/win-mailcarrier-pop-user-remote-buffer-overflow · Note
• https://tabslab.com · Note