PT-2026-58147 · Microsoft · Windows

CVE-2026-49172 · Published 2026-07-14 · Updated 2026-07-14

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 Microsoft Windows (affected versions not specified)

Description A heap-based buffer overflow in the Windows FTP Service allows an unauthorized attacker to execute arbitrary code over a network. A heap-based buffer overflow occurs when a program writes more data to a heap memory block than it can hold, potentially corrupting adjacent memory.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-49172

Affected Products

Windows

References · 11

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49172 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-49172 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-49172 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-49172 · Security Note
• https://reddit.com/r/sysadmin/comments/1uwfgrl/windows_ftp_service_remote_code_execution · Reddit Post
• https://reddit.com/r/CVEWatch/comments/1uwfkgx/windows_ftp_service_remote_code_execution · Reddit Post
• https://twitter.com/vuldb/status/2077100579265139051 · Twitter Post
• https://reddit.com/r/WindowsServer/comments/1uwfcqb/psa_critical_windows_ftp_service_remote_code · Reddit Post
• https://vulnipulse.com/vendors/microsoft · Reddit Post
• https://twitter.com/SecAlertsCo/status/2077131568439566669 · Twitter Post
• https://reddit.com/r/cybersecurity/comments/1uwfiyg/windows_ftp_service_remote_code_execution · Reddit Post