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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00251.

Exploitation poc

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
TABS Laboratories Corporation Win10 MailCarrier affected
Version Status Constraints
2.51 affected
—

Configuration 1 [-]

cpe:2.3:a:tabslab:mailcarrier:2.51:*:*:*:*:*:*:*

No data.

Vendor Product Confidence Versions
Tabs Laboratories Corporation Win10 Mailcarrier — —

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Subscriptions

Vendors Products
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Win10 Mailcarrier Subscribe
Tabslab Subscribe
Mailcarrier Subscribe

Tracking

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.exploit-db.com/exploits/47554 cve-icon cve-icon
https://www.tabslab.com/ cve-icon cve-icon
https://www.vulncheck.com/advisories/win-mailcarrier-pop-user-remote-buffer-overflow cve-icon cve-icon
History

Tue, 24 Feb 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Tabslab
Tabslab mailcarrier
CPEs cpe:2.3:a:tabslab:mailcarrier:2.51:*:*:*:*:*:*:*
Vendors & Products Tabslab
Tabslab mailcarrier

Fri, 20 Feb 2026 01:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 19 Feb 2026 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Tabs Laboratories Corporation
Tabs Laboratories Corporation win10 Mailcarrier
Vendors & Products Tabs Laboratories Corporation
Tabs Laboratories Corporation win10 Mailcarrier

Wed, 18 Feb 2026 22:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Win10 MailCarrier 2.51 - 'POP3 User' Remote Buffer Overflow
Weaknesses CWE-121
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-02-19T20:08:53.368Z

Reserved: 2026-02-13T17:39:25.503Z

Link: CVE-2019-25364

cve-icon Vulnrichment

Updated: 2026-02-19T20:07:10.964Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-18T22:16:22.260

Modified: 2026-02-24T20:41:08.130

Link: CVE-2019-25364

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-19T10:10:39Z

Weaknesses