PT-2026-58173 · Microsoft · Smb+1

CVE-2026-49801 · Published 2026-06-01 · Updated 2026-07-22

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows SMB (affected versions not specified)

Description The use of an uninitialized resource in Windows SMB allows an authorized attacker to disclose sensitive information locally, which may subsequently affect the system.

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

DoS

Use of Uninitialized Resource

Weakness Enumeration

CWE-908

Related Identifiers

BDU:2026-09795

CVE-2026-49801

Affected Products

Smb

Windows

References · 6

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-49801 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49801 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-49801 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-49801 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-09795 · Security Note
• https://t.me/cveNotify/212137 · Telegram Post