PT-2026-58236 · Microsoft · Windows

Published 2026-07-14 · Updated 2026-07-15 · CVE-2026-54990

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 Remote Desktop Client allows an unauthorized attacker to execute code over a network. A heap-based buffer overflow occurs when a program writes more data to a heap memory buffer than it can hold, potentially leading to memory corruption.

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

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-54990

Affected Products

Windows

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-54990 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54990 · Vendor Advisory
• https://twitter.com/vuldb/status/2077117408561758539 · Twitter Post
• https://twitter.com/SecAlertsCo/status/2077373743295308253 · Twitter Post
• https://vulnipulse.com/vendors/microsoft · Reddit Post